-19.59% is the change from 388 to 312
Calculation steps:
[( 312 - 388 ) ÷ 388] x 100 = -19.59%
Formula
Percentage change = [(312 - 388) / 388] x 100
Subtract the new number by the original number
312 - 388 = -76
-76 ÷ 388 = -0.1958762886597938
-0.1958762886597938 x 100 = -19.59%