-91.84% is the change from 331 to 27
Calculation steps:
[( 27 - 331 ) ÷ 331] x 100 = -91.84%
Formula
Percentage change = [(27 - 331) / 331] x 100
Subtract the new number by the original number
27 - 331 = -304
-304 ÷ 331 = -0.918429003021148
-0.918429003021148 x 100 = -91.84%