SOLUTION: A is 40% of B. What percentage is B of A?

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Question 210105This question is from textbook Longman mathematics for IGCSE book1
: A is 40% of B. What percentage is B of A? This question is from textbook Longman mathematics for IGCSE book1

Answer by jim_thompson5910(35256) About Me  (Show Source):
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Note: 40% in decimal form is 40%2F100=0.4

Since "A is 40% of B", this means that A=0.4B


A=0.4B Start with the given equation.


A%2F0.4=B Divide both sides by 0.4 to isolate B


%281%2F0.4%29A=B Rearrange the terms.


2.5A=B Divide


Since 2.5=250%2F100, this means that B is 250% of A.