-66.51% is the change from 657 to 220
Calculation steps:
[( 220 - 657 ) ÷ 657] x 100 = -66.51%
Formula
Percentage change = [(220 - 657) / 657] x 100
Subtract the new number by the original number
220 - 657 = -437
-437 ÷ 657 = -0.665144596651446
-0.665144596651446 x 100 = -66.51%