-22.21% is the change from 851 to 662
Calculation steps:
[( 662 - 851 ) ÷ 851] x 100 = -22.21%
Formula
Percentage change = [(662 - 851) / 851] x 100
Subtract the new number by the original number
662 - 851 = -189
-189 ÷ 851 = -0.22209165687426558
-0.22209165687426558 x 100 = -22.21%