-97.38% is the change from 840 to 22
Calculation steps:
[( 22 - 840 ) ÷ 840] x 100 = -97.38%
Formula
Percentage change = [(22 - 840) / 840] x 100
Subtract the new number by the original number
22 - 840 = -818
-818 ÷ 840 = -0.9738095238095238
-0.9738095238095238 x 100 = -97.38%