-10.34% is the change from 387 to 347
Calculation steps:
[( 347 - 387 ) ÷ 387] x 100 = -10.34%
Formula
Percentage change = [(347 - 387) / 387] x 100
Subtract the new number by the original number
347 - 387 = -40
-40 ÷ 387 = -0.10335917312661498
-0.10335917312661498 x 100 = -10.34%