538.1% is the change from 21 to 134
Calculation steps:
[( 134 - 21 ) ÷ 21] x 100 = 538.1%
Formula
Percentage change = [(134 - 21) / 21] x 100
Subtract the new number by the original number
134 - 21 = 113
113 ÷ 21 = 5.380952380952381
5.380952380952381 x 100 = 538.1%