-63.47% is the change from 657 to 240
Calculation steps:
[( 240 - 657 ) ÷ 657] x 100 = -63.47%
Formula
Percentage change = [(240 - 657) / 657] x 100
Subtract the new number by the original number
240 - 657 = -417
-417 ÷ 657 = -0.634703196347032
-0.634703196347032 x 100 = -63.47%