The number of guavas Daniel bought in October was 10% more than in September. In November, he bought 50% less guavas than in October. If there were 81 more guavas in September than November, how many guavas did Daniel buy in September?
| September |
October |
November |
| 10x2 |
11x2 |
|
| |
2x11 |
1x11 |
| 20 u |
22 u |
11 u |
100% + 10 = 110%
110% =
110100 =
1110October : September = 11 : 10
100% - 50% = 50%
50% =
50100 =
12 November : October = 1 : 2
The number of guavas in October is repeated. Make the number of guavas in October is the same. LCM of 11 and 2 is 22.
Number of more guavas in September than November
= 20 u - 11 u
= 9 u
9 u = 81
1 u = 81 ÷ 9 = 9
Number of guavas that Daniel bought in September
= 20 u
= 20 x 9
= 180
Answer(s): 180
