38.59% is the change from 666 to 923
Calculation steps:
[( 923 - 666 ) ÷ 666] x 100 = 38.59%
Formula
Percentage change = [(923 - 666) / 666] x 100
Subtract the new number by the original number
923 - 666 = 257
257 ÷ 666 = 0.3858858858858859
0.3858858858858859 x 100 = 38.59%