A's income is 25% more than B's income.find B's income in terms of A's income?
Let's use an example, and then derive a formula:
Suppose B's income is $100. A's income is 25% more, which is +$25, or $125.
So far, we have A = B + .25B
or A = 1.25B
To find B in terms of A, we divide both sides by 1.25:
A/1.25 = B,
which can be simplified to
B = A/(5/4)
or B = 4A/5 or B = 0.8 A
This also means that B's income is 80% of A's income, or 20% less than A's income.