Tim and Peter had 20 chocolate bars each. Tim gave 30% of his chocolate bars to Peter. After receiving the chocolate bars from Tim, Peter gave 50% of his total chocolate bars to Kathy. How many chocolate bars had Peter left?
| |
Tim |
Peter |
Kathy |
| Before |
100% |
100% |
|
| Change 1 |
- 30% |
+ 30% |
|
| After 1 |
70% |
130% |
|
| Change 2 |
|
- 65% |
+ 65% |
| After 2 |
|
65% |
|
Percentage of chocolate bars after Peter received from Tim
= 100% + 30%
= 130%
Percentage of Peter's chocolate bars that Kathy had after receiving from Peter
= 50% x 130%
=
50100 x 130%
= 65%
Percentage of chocolate bars that Peter had left after giving to Kathy
= 130% - 65%
= 65%
100% = 20
Number of chocolate bars that Peter had left
= 65% x 20
=
65100 x 20
= 13
Answer(s): 13
