A number is increased by 20%, then decreased by 25% and then further increased by 25%. What is the net increase/decrease percent in the number?
Answer & explanation
Correct answer: option 3
20% = \(\frac{1}{5}\) and 25% = \(\frac{1}{4}\)
ATQ,
@20%⇑ 5 : 6
@25%⇓ 4 : 3
@25%⇑ 4 : 5
Total effect 80 : 90
8 : 9 ⇒ Net increase by = 1
Increase percentage: \(\frac{1}{8}\) × 100 = 12 \(\frac{1}{2}\)