There are 48 students in a school play. the ratio of boys to girls is 5:7. how many more girls than boys are in the school play? Explain your thinking

We can use trial or error method here ...

If we take 4 table, 4*5 = 20 and 4*7 = 28. 20+28 = 48.

20 : 28 = 5 : 7

So, there are 20 boys and 28 girls in a school play and there are 8 girls more than boys.

If you look over tables and try it out, only 4 table works for the given ratio.