PSLEIsaac, Aubrey and David shared $640. Aubrey received 50% more than Isaac while David received 30% less than Isaac. How much more than David did Aubrey receive?
Isaac |
Aubrey |
David |
Total |
100% |
150% |
|
|
100% |
|
70% |
|
10 u |
15 u |
7 u |
32 u |
Isaac : Aubrey : David
100 : 150 : 70
(÷10)10 : 15 : 7
Isaac is the repeated identity.
Total amount that they shared
= 10 u + 15 u + 7 u
= 32 u
32 u = 640
1 u = 640 ÷ 32 = 20
Amount that Aubrey received more than David
= 15 u - 7 u
= 8 u
= 8 x 20
= $160
Answer(s): $160