PSLEIsabella, Grace and Ryan shared $580. Grace received 20% more than Isabella while Ryan received 30% less than Isabella. How much more than Ryan did Grace receive?
Isabella |
Grace |
Ryan |
Total |
100% |
120% |
|
|
100% |
|
70% |
|
10 u |
12 u |
7 u |
29 u |
Isabella : Grace : Ryan
100 : 120 : 70
(÷10)10 : 12 : 7
Isabella is the repeated identity.
Total amount that they shared
= 10 u + 12 u + 7 u
= 29 u
29 u = 580
1 u = 580 ÷ 29 = 20
Amount that Grace received more than Ryan
= 12 u - 7 u
= 5 u
= 5 x 20
= $100
Answer(s): $100