-35.45% is the change from 660 to 426
Calculation steps:
[( 426 - 660 ) ÷ 660] x 100 = -35.45%
Formula
Percentage change = [(426 - 660) / 660] x 100
Subtract the new number by the original number
426 - 660 = -234
-234 ÷ 660 = -0.35454545454545455
-0.35454545454545455 x 100 = -35.45%