Question

I need to find the amount of money the fourth teacher pay. See picture! Thanks?!

Answer 1

Full Price: `$60`
1st teacher: Pays 1/3 of final cost : `$20`
2nd teacher: Pays 1/4 of final cost : `$15`
3rd teacher: Pays 1/5 of the final cost: `$12`
4th teacher: Pays the remainder: `$13`

The method:
To find out how much each one paid, the same method is used for all. The relative percentage they paid is given, for e.g. the first teacher paid `1/2` the sum of money the other teachers paid so this means that if the other teachers paid `$50`, she paid `$25`, `$25 + $50 =$75, 25/75 = 33%` Therefore she paid 1/3 of the final cost being `$20`