-66.29% is the change from 89 to 30
Calculation steps:
[( 30 - 89 ) ÷ 89] x 100 = -66.29%
Formula
Percentage change = [(30 - 89) / 89] x 100
Subtract the new number by the original number
30 - 89 = -59
-59 ÷ 89 = -0.6629213483146067
-0.6629213483146067 x 100 = -66.29%