Answer :
Let Amit’s old salary = Z
∴ Salary after increment = (Z + 20Z/100)
Now,
⇒ (Z + 20 Z/100) = 30600
⇒ (100 Z + 20 Z)/100 = 30600
⇒ 120 Z = 30600 × 100
⇒ Z = 25500
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