41.54% is the change from 455 to 644
Calculation steps:
[( 644 - 455 ) ÷ 455] x 100 = 41.54%
Formula
Percentage change = [(644 - 455) / 455] x 100
Subtract the new number by the original number
644 - 455 = 189
189 ÷ 455 = 0.4153846153846154
0.4153846153846154 x 100 = 41.54%