Neave and Tommy had 90 chocolate bars each. Neave gave 20% of his chocolate bars to Tommy. After receiving the chocolate bars from Neave, Tommy gave 50% of his total chocolate bars to Winnie. How many chocolate bars had Tommy left?
| |
Neave |
Tommy |
Winnie |
| Before |
100% |
100% |
|
| Change 1 |
- 20% |
+ 20% |
|
| After 1 |
80% |
120% |
|
| Change 2 |
|
- 60% |
+ 60% |
| After 2 |
|
60% |
|
Percentage of chocolate bars after Tommy received from Neave
= 100% + 20%
= 120%
Percentage of Tommy's chocolate bars that Winnie had after receiving from Tommy
= 50% x 120%
=
50100 x 120%
= 60%
Percentage of chocolate bars that Tommy had left after giving to Winnie
= 120% - 60%
= 60%
100% = 90
Number of chocolate bars that Tommy had left
= 60% x 90
=
60100 x 90
= 54
Answer(s): 54
