-87.24% is the change from 619 to 79
Calculation steps:
[( 79 - 619 ) ÷ 619] x 100 = -87.24%
Formula
Percentage change = [(79 - 619) / 619] x 100
Subtract the new number by the original number
79 - 619 = -540
-540 ÷ 619 = -0.8723747980613893
-0.8723747980613893 x 100 = -87.24%