-40.8% is the change from 647 to 383
Calculation steps:
[( 383 - 647 ) ÷ 647] x 100 = -40.8%
Formula
Percentage change = [(383 - 647) / 647] x 100
Subtract the new number by the original number
383 - 647 = -264
-264 ÷ 647 = -0.4080370942812983
-0.4080370942812983 x 100 = -40.8%