30.46% is the change from 197 to 257
Calculation steps:
[( 257 - 197 ) ÷ 197] x 100 = 30.46%
Formula
Percentage change = [(257 - 197) / 197] x 100
Subtract the new number by the original number
257 - 197 = 60
60 ÷ 197 = 0.30456852791878175
0.30456852791878175 x 100 = 30.46%