49.92% is the change from 641 to 961
Calculation steps:
[( 961 - 641 ) ÷ 641] x 100 = 49.92%
Formula
Percentage change = [(961 - 641) / 641] x 100
Subtract the new number by the original number
961 - 641 = 320
320 ÷ 641 = 0.49921996879875197
0.49921996879875197 x 100 = 49.92%