Barbara gave 10% of her collection of cards to Hilda thereby increasing Hilda's collection by 24%. If Barbara had 54 cards left, how many cards did Hilda have at first?
| |
Barbara's cards |
Hilda's cards |
| Before |
100% |
100 u |
| Change |
- 10% |
+ 10% = + 24 u |
| After |
90% |
124 u |
90% of Barbara's collection = 54
1% of Barbara's collection = 54 ÷ 90 = 0.6
10% of Barbara's collection = 10 x 0.6 = 6
24 u of Hilda's collection = 6
1 u of Hilda's collection =
625 = 0.25
100 u of Hilda's collection = 100 x 0.25 = 25
Answer(s): 25
