-67.12% is the change from 669 to 220
Calculation steps:
[( 220 - 669 ) ÷ 669] x 100 = -67.12%
Formula
Percentage change = [(220 - 669) / 669] x 100
Subtract the new number by the original number
220 - 669 = -449
-449 ÷ 669 = -0.6711509715994021
-0.6711509715994021 x 100 = -67.12%