-86.4% is the change from 331 to 45
Calculation steps:
[( 45 - 331 ) ÷ 331] x 100 = -86.4%
Formula
Percentage change = [(45 - 331) / 331] x 100
Subtract the new number by the original number
45 - 331 = -286
-286 ÷ 331 = -0.8640483383685801
-0.8640483383685801 x 100 = -86.4%