-35.74% is the change from 666 to 428
Calculation steps:
[( 428 - 666 ) ÷ 666] x 100 = -35.74%
Formula
Percentage change = [(428 - 666) / 666] x 100
Subtract the new number by the original number
428 - 666 = -238
-238 ÷ 666 = -0.35735735735735735
-0.35735735735735735 x 100 = -35.74%