Ivory gave 15% of her collection of beads to Nora thereby increasing Nora's collection by 25%. If Ivory had 51 beads left, how many beads did Nora have at first?
| |
Ivory's beads |
Nora's beads |
| Before |
100% |
100 u |
| Change |
- 15% |
+ 15% = + 25 u |
| After |
85% |
125 u |
85% of Ivory's collection = 51
1% of Ivory's collection = 51 ÷ 85 = 0.6
15% of Ivory's collection = 15 x 0.6 = 9
25 u of Nora's collection = 9
1 u of Nora's collection =
936 = 0.36
100 u of Nora's collection = 100 x 0.36 = 36
Answer(s): 36
