The number of oranges Oliver bought in October was 30% more than in September. In November, he bought 60% less oranges than in October. If there were 288 less oranges in November than September, how many oranges did Oliver buy in October?
| September |
October |
November |
| 10x5 |
13x5 |
|
| |
5x13 |
2x13 |
| 50 u |
65 u |
26 u |
100% + 30 = 130%
130% =
130100 =
1310October : September = 13 : 10
100% - 60% = 40%
40% =
40100 =
25 November : October = 2 : 5
The number of oranges in October is repeated. Make the number of oranges in October is the same. LCM of 13 and 5 is 65.
Number of less oranges in November than September
= 50 u - 26 u
= 24 u
24 u = 288
1 u = 288 ÷ 24 = 12
Number of oranges that Oliver bought in October
= 65 u
= 65 x 12
= 780
Answer(s): 780
