At the farm, the chicken population increased by 30% in the second month and then by a further 10% in the next 5 months. If there were 286 chickens in the end, how many chickens were there at the farm at first?
|
Chickens |
Before |
100% |
Change 1 |
+ 30% |
After 1 |
130% |
Change 2 |
+ 13% |
After 2 |
143% |
Population of chickens at first = 100%
New population of chickens after first increase
= 100% + 30%
= 130%
Percentage of second increase
= 10% x 130%
=
10100 x 130%
= 13%
New population of chickens after second increase
= 130% + 13%
= 143%
143% of chicken population = 286
1% of the chicken population
= 286 ÷ 143
= 2
100% of chicken population
= 100 x 2
= 200
Number of chickens at first = 200
Answer(s): 200