John and Cody had 40 mini cupcakes each. John gave 20% of his mini cupcakes to Cody. After receiving the mini cupcakes from John, Cody gave 50% of his total mini cupcakes to Cathy. How many mini cupcakes had Cody left?
| |
John |
Cody |
Cathy |
| Before |
100% |
100% |
|
| Change 1 |
- 20% |
+ 20% |
|
| After 1 |
80% |
120% |
|
| Change 2 |
|
- 60% |
+ 60% |
| After 2 |
|
60% |
|
Percentage of mini cupcakes after Cody received from John
= 100% + 20%
= 120%
Percentage of Cody's mini cupcakes that Cathy had after receiving from Cody
= 50% x 120%
=
50100 x 120%
= 60%
Percentage of mini cupcakes that Cody had left after giving to Cathy
= 120% - 60%
= 60%
100% = 40
Number of mini cupcakes that Cody had left
= 60% x 40
=
60100 x 40
= 24
Answer(s): 24
