-37.81% is the change from 677 to 421
Calculation steps:
[( 421 - 677 ) ÷ 677] x 100 = -37.81%
Formula
Percentage change = [(421 - 677) / 677] x 100
Subtract the new number by the original number
421 - 677 = -256
-256 ÷ 677 = -0.37813884785819796
-0.37813884785819796 x 100 = -37.81%