-66.15% is the change from 650 to 220
Calculation steps:
[( 220 - 650 ) ÷ 650] x 100 = -66.15%
Formula
Percentage change = [(220 - 650) / 650] x 100
Subtract the new number by the original number
220 - 650 = -430
-430 ÷ 650 = -0.6615384615384615
-0.6615384615384615 x 100 = -66.15%