Diana made 121 more mocca puffs than durian puffs. After she gave away
25 of the mocca puffs and
18 of the durian puffs, there were an equal number of mocca puffs and durian puffs left. How many mocca puffs did she give away?
|
Mocca puffs |
Durian puffs |
Difference |
Before |
5x7 = 35 u |
8x3 = 24 u |
11 u |
Change |
- 2x7 = - 14 u |
- 1x3 = - 3 u |
|
After |
3x7 = 21 u |
7x3 = 21 u |
|
Fraction of mocca puffs left
= 1 -
25 =
35Fraction of durian puffs left
= 1 -
18 =
78The number of mocca puffs and durian puffs in the end is the same. Make the numerators the same. LCM of 7 and 3 is 21.
35 of mocca puffs =
78 of durian puffs
2135 of mocca puffs =
2124 of durian puffs
Number of more mocca puffs than durian puffs at first
= 35 u - 24 u
= 11 u
11 u = 121
1 u = 121 ÷ 11 = 11
Number of mocca puffs that Diana gave away
= 35 u - 21 u
= 14 u
= 14 x 11
= 154
Answer(s): 154