Question 408926
Could someone please show me how to do this problem? The electricity costs of a business increased from $10,000 one year to $13,000 the next. To the nearest whole percent, what was the rate of increase?
A) 31% B) 30%
C) 24% D) 60% 
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Amount of increase: 13000-10000= $3000
Original cost: $10000
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Percent increase= 3000/10000 * 100
Percent increase= 3/10 * 100
Percent increase= 3 * 10
Percent increase= 30%