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