1600% is the change from 21 to 357
Calculation steps:
[( 357 - 21 ) ÷ 21] x 100 = 1600%
Formula
Percentage change = [(357 - 21) / 21] x 100
Subtract the new number by the original number
357 - 21 = 336
336 ÷ 21 = 16
16 x 100 = 1600%
Example