At the farm, the chicken population increased by 30% in the second month and then by a further 20% in the next 5 months. If there were 1560 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 |
+ 26% |
| After 2 |
156% |
Population of chickens at first = 100%
New population of chickens after first increase
= 100% + 30%
= 130%
Percentage of second increase
= 20% x 130%
=
20100 x 130%
= 26%
New population of chickens after second increase
= 130% + 26%
= 156%
156% of chicken population = 1560
1% of the chicken population
= 1560 ÷ 156
= 10
100% of chicken population
= 100 x 10
= 1000
Number of chickens at first = 1000
Answer(s): 1000
