Erika and Betty shared a box of stamps. Erika had 71% of the total stamps. if Erika gave 210 of her stamps to Betty, both would have the same number of stamps. How many stamps did Erika have?
| |
Erika |
Betty |
Total |
| Before |
71% |
29% |
100% |
| Change |
- 21% |
+ 21% |
|
| After |
50% |
50% |
100% |
Total number of stamps that Erika and Betty shared = 100%
If Erika gave 210 stamps to Betty, both would have the same number of stamps.
Number of stamps that each would have in the end
= 100% ÷ 2
= 50%
Number of stamps that Erika gave to Betty
= 71% - 50%
= 21%
21% → 210
1% → 210 ÷ 21 = 10
Number of stamps that Erika had
= 71%
= 71 x 10
= 710
Answer(s): 710
