Question

A's income is 40% more than b's income. how much per cent is b's income less than a's?

Answer 1

let the
B's income be 100B
THEN A 'income 140B
now its about how much small
so
(140B-100B)/140B×100
40B/140B×100
28.6%

Answer 2

this is the answer........hope it helps