196.7% is the change from 91 to 270
Calculation steps:
[( 270 - 91 ) ÷ 91] x 100 = 196.7%
Formula
Percentage change = [(270 - 91) / 91] x 100
Subtract the new number by the original number
270 - 91 = 179
179 ÷ 91 = 1.967032967032967
1.967032967032967 x 100 = 196.7%