63.74% is the change from 171 to 280
Calculation steps:
[( 280 - 171 ) ÷ 171] x 100 = 63.74%
Formula
Percentage change = [(280 - 171) / 171] x 100
Subtract the new number by the original number
280 - 171 = 109
109 ÷ 171 = 0.6374269005847953
0.6374269005847953 x 100 = 63.74%