460% is the change from 15 to 84
Calculation steps:
[( 84 - 15 ) ÷ 15] x 100 = 460%
Formula
Percentage change = [(84 - 15) / 15] x 100
Subtract the new number by the original number
84 - 15 = 69
69 ÷ 15 = 4.6
4.6 x 100 = 460%
Example