41.9% is the change from 642 to 911
Calculation steps:
[( 911 - 642 ) ÷ 642] x 100 = 41.9%
Formula
Percentage change = [(911 - 642) / 642] x 100
Subtract the new number by the original number
911 - 642 = 269
269 ÷ 642 = 0.4190031152647975
0.4190031152647975 x 100 = 41.9%