-70.59% is the change from 102 to 30
Calculation steps:
[( 30 - 102 ) ÷ 102] x 100 = -70.59%
Formula
Percentage change = [(30 - 102) / 102] x 100
Subtract the new number by the original number
30 - 102 = -72
-72 ÷ 102 = -0.7058823529411765
-0.7058823529411765 x 100 = -70.59%