31.68% is the change from 666 to 877
Calculation steps:
[( 877 - 666 ) ÷ 666] x 100 = 31.68%
Formula
Percentage change = [(877 - 666) / 666] x 100
Subtract the new number by the original number
877 - 666 = 211
211 ÷ 666 = 0.31681681681681684
0.31681681681681684 x 100 = 31.68%