Gillian had $345 less than Mary. Mary spent 0.6 of her money and Gillian spent 30% of her money. In the end, Mary and Gillian had the same amount of money left. Find the amount of money that Mary had at first.
| |
Gillian |
Mary |
Comparing Mary
and Gillian at first |
|
345 more |
| Before |
10x2 =
20 u |
5x7 =
35 u |
| Change |
- 3x2 =
- 6 u |
- 3x7 =
- 21 u |
| After |
7x2 =
14 u |
2x7 =
14 u |
0.6 =
610 =
35 30% =
30100 =
310 Gillian and Mary had the same amount of money in the end. Make the amount that each had in the end the same. LCM of 2 and 7 is 14.
Amount that Gillian had less than Mary at first
= 35 u - 20 u
= 15 u
15 u = 345
1 u = 345 ÷ 15 = 23
Amount that Mary had at first
= 35 u
= 35 x 23
= $805
Answer(s): $805
