8.23% is the change from 851 to 921
Calculation steps:
[( 921 - 851 ) ÷ 851] x 100 = 8.23%
Formula
Percentage change = [(921 - 851) / 851] x 100
Subtract the new number by the original number
921 - 851 = 70
70 ÷ 851 = 0.08225616921269095
0.08225616921269095 x 100 = 8.23%