Formula: If a number increased by x%, then increased number = Actual number × [(100 + x)/100] Calculation: Let price of the phone be 100x, then Price of phone after changes = 100x×[
120
100
]×[
75
100
]×[
125
100
]=Rs.112.5x Price of phone increased by = 112.5x – 100x = 12.5x ∴ Price of phone increased by = [12.5