-78.82% is the change from 340 to 72
Calculation steps:
[( 72 - 340 ) ÷ 340] x 100 = -78.82%
Formula
Percentage change = [(72 - 340) / 340] x 100
Subtract the new number by the original number
72 - 340 = -268
-268 ÷ 340 = -0.788235294117647
-0.788235294117647 x 100 = -78.82%