If the charges per hour of internet surfing are increased by 25%, find the decrease in the time period of surfing
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time × rate = total charges
100 × 100 = 10000
X × 125 = 110 ( 25 % increase in rate ,user can afford only 10% increase)
X = 110 ÷ 125 × 100 =88%
Thus,decrease in time = 12%
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