Three girls gave an equal amount of money to buy a souvenir for Harry. Abi used
16 of her money. Jade used
34 of her money and Dana used
45 of hers. They had a total of $515 at first. How much was the souvenir?
| |
Abi |
Jade |
Dana |
Total |
| Before |
6x12 =
72 u |
4x4 =
16 u |
5x3 =
15 u |
103 u ($515) |
| Change |
- 1x12 =
- 12 u |
- 3x4 =
- 12 u |
- 4x3 =
- 12 u |
- 36 u |
| After |
5x12 =
60 u |
1x4 =
4 u |
1x3 =
3 u |
67 u |
The three girls gave equal amount of money to buy the souvenir. Make the amount that each spent the same. LCM of 1, 3 and 4 is 12.
Total amount that three girls had at first
= 72 u + 16 u + 15 u
= 103 u
103 u = 515
1 u = 515 ÷ 103 = 5
Cost of the souvenir
= 3 x 12 u
= 36 u
= 36 x 5
= $180
Answer(s): $180
