-97.95% is the change from 977 to 20
Calculation steps:
[( 20 - 977 ) ÷ 977] x 100 = -97.95%
Formula
Percentage change = [(20 - 977) / 977] x 100
Subtract the new number by the original number
20 - 977 = -957
-957 ÷ 977 = -0.9795291709314228
-0.9795291709314228 x 100 = -97.95%