The number of plums Ahmad bought in October was 20% more than in September. In November, he bought 75% less plums than in October. If there were 77 more plums in September than November, how many plums did Ahmad buy in September?
| September |
October |
November |
| 5x2 |
6x2 |
|
| |
4x3 |
1x3 |
| 10 u |
12 u |
3 u |
100% + 20 = 120%
120% =
120100 =
65October : September = 6 : 5
100% - 75% = 25%
25% =
25100 =
14 November : October = 1 : 4
The number of plums in October is repeated. Make the number of plums in October is the same. LCM of 6 and 4 is 12.
Number of more plums in September than November
= 10 u - 3 u
= 7 u
7 u = 77
1 u = 77 ÷ 7 = 11
Number of plums that Ahmad bought in September
= 10 u
= 10 x 11
= 110
Answer(s): 110
