-37.03% is the change from 667 to 420
Calculation steps:
[( 420 - 667 ) ÷ 667] x 100 = -37.03%
Formula
Percentage change = [(420 - 667) / 667] x 100
Subtract the new number by the original number
420 - 667 = -247
-247 ÷ 667 = -0.37031484257871067
-0.37031484257871067 x 100 = -37.03%