49 of Will's savings comprised of 10-cent coins and 50-cent coins. Will used some 10-cent coins to purchase a yoyo. The number of 50-cent coins left was 50% more than the number of 10-cent coins left. Given that Will had 25 more 50-cent coins than 10-cent coins left in the end, find the amount of money Will spent on the yoyo.
|
10-cent coins |
50-cent coins |
Before |
4x3 = 12 u |
5x3 = 15 u |
Change |
- 2 u |
|
After |
2x5 = 10 u |
3x5 = 15 u |
Fraction of Will's savings that comprised of 50-cent coins
= 1 -
49=
59Number of 50-cents coins in the end in percentage
= 100% + 50%
= 150%
150% =
150100 =
32Number of 50-cent coins remains unchanged. Make the number of 50-cent coins the same. LCM of 5 and 3 is 15.
Number of more 50-cent coins than 10-cent coins
= 15 u - 10 u
= 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Number of 10-cent coins spent on the yoyo
= 12 u - 10 u
= 2 u
= 2 x 5
= 10
Amount that Will spent on the yoyo
= 10 x 0.1
= $1
Answer(s): $1