-85.5% is the change from 331 to 48
Calculation steps:
[( 48 - 331 ) ÷ 331] x 100 = -85.5%
Formula
Percentage change = [(48 - 331) / 331] x 100
Subtract the new number by the original number
48 - 331 = -283
-283 ÷ 331 = -0.8549848942598187
-0.8549848942598187 x 100 = -85.5%