Question

in 15 minutes lena can finish 2 math homework problems. how many math problems can she finish in 75 minutes?

Answer 1

Set up a proportion.
(x is the amount of problems she can do in 75 mins)


`(2)/(15) = (x)/(75)`

Now, to find 'x', we need to have it on its own, so we multiply by 75 on both sides.


`(2)/(15)` ×
`75 = x`

The answer is 10, as
`(2)/(15)` multiplied by 75 is 10.

Answer 2

Lena would be able to finish 10 math homwork problems. 15*5 equals 75. So multiply 2 by 5 and thats how many problems Lena can do in 75 minutes.