A number exceeds 20% of itself by 40. The number is
Let the number = Z
∴ 20% of Z + 40 = Z
⇒ (Z × 20/100) + 40 = Z
⇒ Z/5 + 40 = Z
⇒ Z – Z/5 = 40
⇒ 4Z/5 = 40
⇒ Z = 40 × 5/4
⇒ Z = 50