Question

PLEASE HELP?
Joey opened a bank account 5 years ago with $100. Today he has %1,000 in the account. What is the percentage of increase?

Answer 1

The percentage of increases when the amount doubled
Use the 72 rule
72/time=rate
72÷5=14.4%

Answer 2

Percent increase: (New-Original)/original * 100
Percent Inc = (1000 -100)/100 * 100
Percent Increase = 900% increase