Carl and Ethan had 90 mochi balls each. Carl gave 40% of his mochi balls to Ethan. After receiving the mochi balls from Carl, Ethan gave 50% of his total mochi balls to Emily. How many mochi balls had Ethan left?
| |
Carl |
Ethan |
Emily |
| Before |
100% |
100% |
|
| Change 1 |
- 40% |
+ 40% |
|
| After 1 |
60% |
140% |
|
| Change 2 |
|
- 70% |
+ 70% |
| After 2 |
|
70% |
|
Percentage of mochi balls after Ethan received from Carl
= 100% + 40%
= 140%
Percentage of Ethan's mochi balls that Emily had after receiving from Ethan
= 50% x 140%
=
50100 x 140%
= 70%
Percentage of mochi balls that Ethan had left after giving to Emily
= 140% - 70%
= 70%
100% = 90
Number of mochi balls that Ethan had left
= 70% x 90
=
70100 x 90
= 63
Answer(s): 63
