41.64% is the change from 646 to 915
Calculation steps:
[( 915 - 646 ) ÷ 646] x 100 = 41.64%
Formula
Percentage change = [(915 - 646) / 646] x 100
Subtract the new number by the original number
915 - 646 = 269
269 ÷ 646 = 0.41640866873065013
0.41640866873065013 x 100 = 41.64%