-88.05% is the change from 251 to 30
Calculation steps:
[( 30 - 251 ) ÷ 251] x 100 = -88.05%
Formula
Percentage change = [(30 - 251) / 251] x 100
Subtract the new number by the original number
30 - 251 = -221
-221 ÷ 251 = -0.8804780876494024
-0.8804780876494024 x 100 = -88.05%