Fanny, Olivia and Opal went shopping together. They brought a total of $1549 with them. Fanny spent 30% of her money. Olivia spent $228 and Opal spent twice as much money as Fanny. In the end, they had $637 left. How much money did Olivia and Opal have altogether in the end?
| |
Fanny |
Olivia |
Opal |
Total |
| Before |
10 u |
|
|
1549 |
| Change |
- 3 u |
- 228 |
- 6 u |
- 912 |
| After |
7 u |
? |
637 |
30% =
30100 =
310 Fanny spent: Fanny's total = 3 : 10
Amount that Opal spent
= 2 x 3 u
= 6 u
Amount that the three girls spent
= 3 u + 6 u + 228
= 9 u + 228
Amount that the three girls spent
= 1549 - 637
= $912
9 u + 228 = 912
9 u = 912 - 228
9 u = 684
1 u = 684 ÷ 9 = 76
Amount that Olivia and Opal had in the end
= 637 - 7 u
= 637 - 7 x 76
= 637 - 532
= $105
Answer(s): $105
