3.18% is the change from 850 to 877
Calculation steps:
[( 877 - 850 ) ÷ 850] x 100 = 3.18%
Formula
Percentage change = [(877 - 850) / 850] x 100
Subtract the new number by the original number
877 - 850 = 27
27 ÷ 850 = 0.03176470588235294
0.03176470588235294 x 100 = 3.18%