Charlie and Ryan had 20 mochi balls each. Charlie gave 40% of his mochi balls to Ryan. After receiving the mochi balls from Charlie, Ryan gave 50% of his total mochi balls to Tammy. How many mochi balls had Ryan left?
| |
Charlie |
Ryan |
Tammy |
| Before |
100% |
100% |
|
| Change 1 |
- 40% |
+ 40% |
|
| After 1 |
60% |
140% |
|
| Change 2 |
|
- 70% |
+ 70% |
| After 2 |
|
70% |
|
Percentage of mochi balls after Ryan received from Charlie
= 100% + 40%
= 140%
Percentage of Ryan's mochi balls that Tammy had after receiving from Ryan
= 50% x 140%
=
50100 x 140%
= 70%
Percentage of mochi balls that Ryan had left after giving to Tammy
= 140% - 70%
= 70%
100% = 20
Number of mochi balls that Ryan had left
= 70% x 20
=
70100 x 20
= 14
Answer(s): 14
