Mark spent 18 of his money on balloons, 16 of the remaining money on a cake and $132 on snacks. He had 12 of his money. How much money did he have at first?
Balloons |
Remaining amount |
Total |
1x6 |
7x6 |
8x6 |
|
Cake |
Snacks |
Left |
|
|
1x7 |
5x7 |
|
6 u |
7 u |
35 u |
48 u |
Fraction of the amount that Mark had left after spending on balloons
= 1 -
18 =
78 Fraction of the remaining amount that Mark had left after spending on a cake
= 1 -
16 =
56 The remaining amount is the combined repeated identity. Make the remaining amount the same. LCM of 7 and 6 is 42.
Amount that Mark had left
=
12 x 48 u
= 24 u
Amount that Mark spent on snacks
= 35 u - 24 u
= 11 u
11 u = 132
1 u = 132 ÷ 11 = 12
Total amount that Mark had at first
= 48 u
= 48 x 12
= $576
Answer(s): $576