SOLUTION: Tell whether each pair of ratios forms a proportion: 9/24 and 15/40

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Question 168817This question is from textbook
: Tell whether each pair of ratios forms a proportion:
9/24 and 15/40 This question is from textbook

Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
9%2F24 and 15%2F40 ---> proportion?
>>>Statement of equality, okay.
%289%2F24%29=%2815%2F40%29, cross multiply
9%2A40=15%2A24
360=360, Proportion
Another way,
%289%2F24%29, divide both num & den by 3
%283%2F8%29 ----> A
And, 15%2F24, divide both num & den by 5
3%2F8-----> B
As you see, A=B, proportion.
Thank you,
Jojo