-77.53% is the change from 979 to 220
Calculation steps:
[( 220 - 979 ) ÷ 979] x 100 = -77.53%
Formula
Percentage change = [(220 - 979) / 979] x 100
Subtract the new number by the original number
220 - 979 = -759
-759 ÷ 979 = -0.7752808988764045
-0.7752808988764045 x 100 = -77.53%