Tina and Jane shared a box of stamps. Tina had 70% of the total stamps. if Tina gave 180 of her stamps to Jane, both would have the same number of stamps. How many stamps did Tina have?
| |
Tina |
Jane |
Total |
| Before |
70% |
30% |
100% |
| Change |
- 20% |
+ 20% |
|
| After |
50% |
50% |
100% |
Total number of stamps that Tina and Jane shared = 100%
If Tina gave 180 stamps to Jane, 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 Tina gave to Jane
= 70% - 50%
= 20%
20% → 180
1% → 180 ÷ 20 = 9
Number of stamps that Tina had
= 70%
= 70 x 9
= 630
Answer(s): 630
