Sabrina had $115 less than Cathy. Cathy spent 0.4 of her money and Sabrina spent 20% of her money. In the end, Cathy and Sabrina had the same amount of money left. Find the amount of money that Cathy had at first.
| |
Sabrina |
Cathy |
Comparing Cathy
and Sabrina at first |
|
115 more |
| Before |
5x3 =
15 u |
5x4 =
20 u |
| Change |
- 1x3 =
- 3 u |
- 2x4 =
- 8 u |
| After |
4x3 =
12 u |
3x4 =
12 u |
0.4 =
410 =
25 20% =
20100 =
15 Sabrina and Cathy had the same amount of money in the end. Make the amount that each had in the end the same. LCM of 3 and 4 is 12.
Amount that Sabrina had less than Cathy at first
= 20 u - 15 u
= 5 u
5 u = 115
1 u = 115 ÷ 5 = 23
Amount that Cathy had at first
= 20 u
= 20 x 23
= $460
Answer(s): $460
