42.64% is the change from 666 to 950
Calculation steps:
[( 950 - 666 ) ÷ 666] x 100 = 42.64%
Formula
Percentage change = [(950 - 666) / 666] x 100
Subtract the new number by the original number
950 - 666 = 284
284 ÷ 666 = 0.4264264264264264
0.4264264264264264 x 100 = 42.64%