-63.93% is the change from 219 to 79
Calculation steps:
[( 79 - 219 ) ÷ 219] x 100 = -63.93%
Formula
Percentage change = [(79 - 219) / 219] x 100
Subtract the new number by the original number
79 - 219 = -140
-140 ÷ 219 = -0.639269406392694
-0.639269406392694 x 100 = -63.93%