Scale factors and percentages GCSE IGCSE Maths
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- Опубліковано 1 жов 2024
- Scale factors and their use in solving percentage increase and decrease problems
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Really neat and understandable, thanks
Very helpful mate!!
Thanks, pleased it was useful!
yh
how did u get the increase of 40% and the decrease of 20% in 10:48
from 1.4 and 0.8
Look at the start of the video again - that explains how to convert percentages to scale factors, eg 60% being 0.6 etc. Now in reverse if you have a scale factor of 0.8 that's 80%. If you start with 100%, that's a reduction of 20%. Same with 1.4, which is 140%, or an increase of 40%.
@@Mathsaurusgot it! thank you so much.
how is the sf 0.82
Imagine you start with 100% of something. Then reducing b 18% means you end up with 82% of what you started with as 100 - 18 = 82 . So we multiply the original amount by 0.82 to get the new amount.
@@Mathsaurus thankyou