-57.43% is the change from 646 to 275
Calculation steps:
[( 275 - 646 ) ÷ 646] x 100 = -57.43%
Formula
Percentage change = [(275 - 646) / 646] x 100
Subtract the new number by the original number
275 - 646 = -371
-371 ÷ 646 = -0.5743034055727554
-0.5743034055727554 x 100 = -57.43%