-20.41% is the change from 392 to 312
Calculation steps:
[( 312 - 392 ) ÷ 392] x 100 = -20.41%
Formula
Percentage change = [(312 - 392) / 392] x 100
Subtract the new number by the original number
312 - 392 = -80
-80 ÷ 392 = -0.20408163265306123
-0.20408163265306123 x 100 = -20.41%