Question

Popoulation of town two years ago 45000 if increased 12% for first year and decreased 15% for second year.what was the population end of second year

Answer 1

12% of 45000
= 5400

then total population = 45000+5400
= 50400 after first year

15% of 50400
= 7560

then total population = 40400-7560
= 42840 after second year

answer is
42840

hope it helps you
@di

Answer 2

Population of the town 2 yrs ago = 45000
Total no. of people at the end of first
yr = 45000+45000*12/100
= 50400
Total no. of people at the end of second
yr = 50400-50400*15/100
= 42840 (ans)