-97.61% is the change from 837 to 20
Calculation steps:
[( 20 - 837 ) ÷ 837] x 100 = -97.61%
Formula
Percentage change = [(20 - 837) / 837] x 100
Subtract the new number by the original number
20 - 837 = -817
-817 ÷ 837 = -0.97610513739546
-0.97610513739546 x 100 = -97.61%