-55.92% is the change from 642 to 283
Calculation steps:
[( 283 - 642 ) ÷ 642] x 100 = -55.92%
Formula
Percentage change = [(283 - 642) / 642] x 100
Subtract the new number by the original number
283 - 642 = -359
-359 ÷ 642 = -0.559190031152648
-0.559190031152648 x 100 = -55.92%