-87.66% is the change from 308 to 38
Calculation steps:
[( 38 - 308 ) ÷ 308] x 100 = -87.66%
Formula
Percentage change = [(38 - 308) / 308] x 100
Subtract the new number by the original number
38 - 308 = -270
-270 ÷ 308 = -0.8766233766233766
-0.8766233766233766 x 100 = -87.66%