8.24% is the change from 850 to 920
Calculation steps:
[( 920 - 850 ) ÷ 850] x 100 = 8.24%
Formula
Percentage change = [(920 - 850) / 850] x 100
Subtract the new number by the original number
920 - 850 = 70
70 ÷ 850 = 0.08235294117647059
0.08235294117647059 x 100 = 8.24%