This year 40 more children joined a football league than joined last year.children in this year’s league is 110% of the number in last year’s league.

Question

This year 40 more children joined a football league than joined last year. The number of children in this year’s league is 110% of the number in last year’s league. How many children played in the league last year?

Answer 1

Hi Thinley,

 

Let C = # Children who joined the football league LAST year

Let T = # Children who joined the football league THIS year

 

We know T = C + 40

AND

T = 1.10C

 

We can use substitution to solve

 

1.10C = C + 40

0.1C = 40

C = 400