Three girls gave an equal amount of money to buy a present for Perry. Dana used
14 of her money. Cindy used
34 of her money and Gabby used
45 of hers. They had a total of $869 at first. How much was the present?
| |
Dana |
Cindy |
Gabby |
Total |
| Before |
4x12 =
48 u |
4x4 =
16 u |
5x3 =
15 u |
$869 |
| Change |
- 1x12 =
- 12 u |
- 3x4 =
- 12 u |
- 4x3 =
- 12 u |
- 36 u |
| After |
3x12 =
36 u |
1x4 =
4 u |
1x3 =
3 u |
u |
The three girls gave equal amount of money to buy the present. Make the amount that each spent the same. LCM of 1, 3 and 4 is 12.
Total amount that three girls had at first
= 48 u + 16 u + 15 u
= 79 u
79 u = 869
1 u = 869 ÷ 79 = 11
Cost of the present
= 3 x 12 u
= 36 u
= 36 x 11
= $396
Answer(s): $396
