-21.45% is the change from 331 to 260
Calculation steps:
[( 260 - 331 ) ÷ 331] x 100 = -21.45%
Formula
Percentage change = [(260 - 331) / 331] x 100
Subtract the new number by the original number
260 - 331 = -71
-71 ÷ 331 = -0.21450151057401812
-0.21450151057401812 x 100 = -21.45%