31.96% is the change from 97 to 128
Calculation steps:
[( 128 - 97 ) ÷ 97] x 100 = 31.96%
Formula
Percentage change = [(128 - 97) / 97] x 100
Subtract the new number by the original number
128 - 97 = 31
31 ÷ 97 = 0.31958762886597936
0.31958762886597936 x 100 = 31.96%