Min gave 8% of her collection of marbles to Ivory thereby increasing Ivory's collection by 20%. If Min had 46 marbles left, how many marbles did Ivory have at first?
| |
Min's marbles |
Ivory's marbles |
| Before |
100% |
100 u |
| Change |
- 8% |
+ 8% = + 20 u |
| After |
92% |
120 u |
92% of Min's collection = 46
1% of Min's collection = 46 ÷ 92 = 0.5
8% of Min's collection = 8 x 0.5 = 4
20 u of Ivory's collection = 4
1 u of Ivory's collection =
420 = 0.2
100 u of Ivory's collection = 100 x 0.2 = 20
Answer(s): 20
