130% x n = 70 130/100 x n = 70 -> evaluation n = 70/ 130/100 -> evaluation n = 70 x 10/13 -> evaluation n = 700/13 ≈ 53.846 ≈ 53.85 ✅-> solution ------------------------------------------------ Test: 130% of 53.85 (130 : 100) x 53.85 1.3 x 53.85 = 70.005
About 55 yrs ago I learned this in a european school when I was about 14: 130% = 70 1% = 70 / 130 100% = (70 * 100) / 130 100% = 7000 / 130 = 700 / 13 = 53.85 Don't make it so hard - this is Easy!
For some unknown reason, he has a very consistent habit of truncating instead of rounding. It's a completely bizarre thing for a mathematics teacher to do.
Given:- 130% of ‘x’ = 70 Solve for ‘x’! 130% is simply 130 ÷ 100 = 1.30 Dropping the trailing zero: ∴ 1.3 × x = 70 … Now divide both sides by 1.3 to isolate & solve for ‘x’: 1.3(x) ÷ 1.3 = 70 ÷ 1.3 x = 70 ÷ 1.3 (Or to eliminate the decimal, multiply both the numerator & denominator ×10 … thus: x = 700 ÷ 13) … the result is the same: ∴ x ≃ 53.846153 846153 846153 846153 846153 … 846153 … ad infinitum. ∵ 13 is Prime any № where 13 isn’t a factor results in a 6-digit repeating decimal. As the original problem was given in % it is logical to round to 2-decimal places. Thus:- x ≈ 53.85 … Q.E.D. (I hated having to show the working-out in ‘ink’ in order to get the mark in England!)
130% . x = 70 so x = 70 / 130% = 70 / (130/100) = 70 . 100/130 = 7000 / 130 = 700 / 13 ~ 53.8 units
130x 70
------ = ----
100 1
130x = 7000
X = 7000
---- = 53.84
130
70/1.3 ≈ 53.846 Rounded up to 53.85
130% x n = 70
130/100 x n = 70 -> evaluation
n = 70/ 130/100 -> evaluation
n = 70 x 10/13 -> evaluation
n = 700/13 ≈ 53.846 ≈ 53.85 ✅-> solution
------------------------------------------------
Test: 130% of 53.85
(130 : 100) x 53.85
1.3 x 53.85 = 70.005
53.85
I get... 53. 846153 846153 846153 846153 846153 843153 846153... Well, approximately that anyway. I left off a whole bunch of "856153's."
1.3 × y =70
70÷1.3 ~ 53.85
53.85: Thank you Sister Theresa
In my head, 75 seconds, got to 53.84xxx, figured I'd gotten close enough.
130x/100 = 70
13x/10 = 70
13x = 700
x = 700/13
I used pencil, paper and long division, comes to 53.8461538461 and I think the 538461 sequence repeats forever after that.
About 55 yrs ago I learned this in a european school when I was about 14:
130% = 70
1% = 70 / 130
100% = (70 * 100) / 130
100% = 7000 / 130 = 700 / 13 = 53.85
Don't make it so hard - this is Easy!
Which number, not what number.
130% means 130/100, so if we name the result x, we can state, that
(130/100)*x=70
x=70*100/130
So x is about 34 (a little bit less than 54).
Answer:
130% of ~53.85 is 70
---------
130% of X = 70
1.3 of X = 70
1.3 * X = 70
X = 70 ➗ 1.3 = 53.85
91
Are you shure, that you really understand the question?
700 / 13. It`'s a recurring decimal.
130x/100=70
X=70x100/130=53.846
53.846 130X = 70 70 / 130 = 53.846 thanks for the fun.
130% of something is just 1.3 × that thing.
So the number is 70/1.3, which is 53.846153... (that 846153 pattern is recurring).
130/100•x=70
1,3•x=70
x=70/1,3=53,846
Simplify it by just dividing 70 by 130.
This will give you 1%.
Then just multiply that by 100 for the answer.
Too many people overcomplicating it.
53.8461
Using partial quotient division, I got 53 11/13.
I like the way you did that! (People seem almost afraid of fractions today!)
100%/130%x70=53,85
53 11/13 by hand
53.9 = 70.07
100*(70/130)
70/1.3 is53.846
X = 70 / 1.3 = ~53.846..
I’ll agree with Adam 53.85 = 70.005
70/130 x 100 ~ = 53.84…
53 110/13, or 53.84615
54 equals 70.2
9100
53.846 HEE HEE 😂💀✌
x=53.846
100
53.85 you rounded wrong
If you are rounding to hundreths,, it should be 53.85
Yes, that is what I came up with on my computer's calculator.
For some unknown reason, he has a very consistent habit of truncating instead of rounding. It's a completely bizarre thing for a mathematics teacher to do.
12 1/2 minutes to divide 70 by 1.3....and then it's rounded wrong:
👎
55.555 is correct
No. The exact result is 700/13, which is a little bit smaller than 54 (54=702/13). So 55.555 is to large.
69.99 is not 70.
Answer 91.
There is an exact answer 53 11/13
53.4 is correct
53.85 is correct.
Give the guy a break; he bought a Dodge, for God's sake.@@EricWells-s2p
@@EricWells-s2p 700/13 is correct and 53.85 is the rounded decimal value of 700/13, but it is not exact but rounded ...
@@juergenilse3259 Correct, of course.
53.4, the suggested answer immediately preceeding mine, is incorrect.
Given:-
130% of ‘x’ = 70
Solve for ‘x’!
130% is simply 130 ÷ 100 = 1.30
Dropping the trailing zero: ∴ 1.3 × x = 70 …
Now divide both sides by 1.3 to isolate & solve for ‘x’:
1.3(x) ÷ 1.3 = 70 ÷ 1.3
x = 70 ÷ 1.3
(Or to eliminate the decimal, multiply both the numerator & denominator ×10 …
thus: x = 700 ÷ 13) … the result is the same:
∴ x ≃ 53.846153 846153 846153 846153 846153 … 846153 … ad infinitum.
∵ 13 is Prime any № where 13 isn’t a factor results in a 6-digit repeating decimal.
As the original problem was given in % it is logical to round to 2-decimal places.
Thus:-
x ≈ 53.85 …
Q.E.D.
(I hated having to show the working-out in ‘ink’ in order to get the mark in England!)
91
21
91
91