42.12% is the change from 641 to 911
Calculation steps:
[( 911 - 641 ) ÷ 641] x 100 = 42.12%
Formula
Percentage change = [(911 - 641) / 641] x 100
Subtract the new number by the original number
911 - 641 = 270
270 ÷ 641 = 0.42121684867394693
0.42121684867394693 x 100 = 42.12%