-90.07% is the change from 302 to 30
Calculation steps:
[( 30 - 302 ) ÷ 302] x 100 = -90.07%
Formula
Percentage change = [(30 - 302) / 302] x 100
Subtract the new number by the original number
30 - 302 = -272
-272 ÷ 302 = -0.9006622516556292
-0.9006622516556292 x 100 = -90.07%