-38.49% is the change from 634 to 390
Calculation steps:
[( 390 - 634 ) ÷ 634] x 100 = -38.49%
Formula
Percentage change = [(390 - 634) / 634] x 100
Subtract the new number by the original number
390 - 634 = -244
-244 ÷ 634 = -0.38485804416403785
-0.38485804416403785 x 100 = -38.49%