49.77% is the change from 661 to 990
Calculation steps:
[( 990 - 661 ) ÷ 661] x 100 = 49.77%
Formula
Percentage change = [(990 - 661) / 661] x 100
Subtract the new number by the original number
990 - 661 = 329
329 ÷ 661 = 0.4977307110438729
0.4977307110438729 x 100 = 49.77%