The electricity bill of sarah's house for the last month was $60, while for this month it is $120. if p is the percent increase in the amount, which proportion can be used to calculate p?
The electricity bill of Sarah’s house for the last month was $60, while for this month it is $120. If p is the percent increase in the amount, which proportion can be used to calculate p ------- p/100 = (120-60)/60 p/100 = 1 p = 100%
