-18.64% is the change from 381 to 310
Calculation steps:
[( 310 - 381 ) ÷ 381] x 100 = -18.64%
Formula
Percentage change = [(310 - 381) / 381] x 100
Subtract the new number by the original number
310 - 381 = -71
-71 ÷ 381 = -0.18635170603674542
-0.18635170603674542 x 100 = -18.64%