69.8k views
1 vote
30% of Number A is the same as 40% of Number B.

What could A and B be?
Think of lots of answers if you can.

User Bnlucas
by
7.0k points

1 Answer

0 votes

30% of number A means


(30A)/(100)=(3A)/(10)

similarly, 40% of number B means


(40B)/(100)=(2B)/(5)

These must be equal, so we have


(3A)/(10)=(2B)/(5)

Multiply both sides by 10 to get


3A=4B \iff A=(4B)/(3)

So, you can choose any number for A, and then you multiply it by 4/3 to get B. There are infinitely many solutions to this equation.

User HongKilDong
by
6.6k points