855% is the change from 20 to 191
Calculation steps:
[( 191 - 20 ) ÷ 20] x 100 = 855%
Formula
Percentage change = [(191 - 20) / 20] x 100
Subtract the new number by the original number
191 - 20 = 171
171 ÷ 20 = 8.55
8.55 x 100 = 855%
Example