-35.38% is the change from 650 to 420
Calculation steps:
[( 420 - 650 ) ÷ 650] x 100 = -35.38%
Formula
Percentage change = [(420 - 650) / 650] x 100
Subtract the new number by the original number
420 - 650 = -230
-230 ÷ 650 = -0.35384615384615387
-0.35384615384615387 x 100 = -35.38%