Question

a person salary increase from rupees 7200 to rupees 8100 what is the percentage increase in his salary​

Answer 1

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$original \: price \: = 7200 \\ present = 8100 \\ therefore \: the \: original \: price \: is \: = \\ increase = rs.8100 - 7200 \\ \\ = 900 \\ now \: increase \: percentage \: = 900 \div 7200 \times 100 \\ \\ = 12.5$