-77.94% is the change from 399 to 88
Calculation steps:
[( 88 - 399 ) ÷ 399] x 100 = -77.94%
Formula
Percentage change = [(88 - 399) / 399] x 100
Subtract the new number by the original number
88 - 399 = -311
-311 ÷ 399 = -0.7794486215538847
-0.7794486215538847 x 100 = -77.94%