-57.12% is the change from 646 to 277
Calculation steps:
[( 277 - 646 ) ÷ 646] x 100 = -57.12%
Formula
Percentage change = [(277 - 646) / 646] x 100
Subtract the new number by the original number
277 - 646 = -369
-369 ÷ 646 = -0.5712074303405573
-0.5712074303405573 x 100 = -57.12%