-62.03% is the change from 79 to 30
Calculation steps:
[( 30 - 79 ) ÷ 79] x 100 = -62.03%
Formula
Percentage change = [(30 - 79) / 79] x 100
Subtract the new number by the original number
30 - 79 = -49
-49 ÷ 79 = -0.620253164556962
-0.620253164556962 x 100 = -62.03%