4500% is the change from 15 to 690
Calculation steps:
[( 690 - 15 ) ÷ 15] x 100 = 4500%
Formula
Percentage change = [(690 - 15) / 15] x 100
Subtract the new number by the original number
690 - 15 = 675
675 ÷ 15 = 45
45 x 100 = 4500%
Example