The correct option is A a > b
Step 1: Solving for a
Given, the number 4 is increased by a% to reach 5.
4 is increaded by a% = 4 + 4a∴4+4a=5 4a=5−4 4a=1 a=14
⇒ a=Percenatge increased
a=14×100 =0.25×100 =25%
Step 2: Solving for b
Given, the number 5 is decreased by b% to reach 5.
5 is decreaded by b% = 5 - 5b∴5+5b=4 5b=5−4 5b=1 b=15
⇒ b=Percenatge decreased
b=15×100 =0.2×100 =20%
∴a=25%, b=20%
Option a is correct: a > b