40.85% is the change from 661 to 931
Calculation steps:
[( 931 - 661 ) ÷ 661] x 100 = 40.85%
Formula
Percentage change = [(931 - 661) / 661] x 100
Subtract the new number by the original number
931 - 661 = 270
270 ÷ 661 = 0.4084720121028744
0.4084720121028744 x 100 = 40.85%