655.88% is the change from 34 to 257
Calculation steps:
[( 257 - 34 ) ÷ 34] x 100 = 655.88%
Formula
Percentage change = [(257 - 34) / 34] x 100
Subtract the new number by the original number
257 - 34 = 223
223 ÷ 34 = 6.5588235294117645
6.5588235294117645 x 100 = 655.88%