-39.04% is the change from 689 to 420
Calculation steps:
[( 420 - 689 ) ÷ 689] x 100 = -39.04%
Formula
Percentage change = [(420 - 689) / 689] x 100
Subtract the new number by the original number
420 - 689 = -269
-269 ÷ 689 = -0.3904208998548621
-0.3904208998548621 x 100 = -39.04%