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