34.47% is the change from 644 to 866
Calculation steps:
[( 866 - 644 ) ÷ 644] x 100 = 34.47%
Formula
Percentage change = [(866 - 644) / 644] x 100
Subtract the new number by the original number
866 - 644 = 222
222 ÷ 644 = 0.3447204968944099
0.3447204968944099 x 100 = 34.47%