-77.57% is the change from 642 to 144
Calculation steps:
[( 144 - 642 ) ÷ 642] x 100 = -77.57%
Formula
Percentage change = [(144 - 642) / 642] x 100
Subtract the new number by the original number
144 - 642 = -498
-498 ÷ 642 = -0.7757009345794392
-0.7757009345794392 x 100 = -77.57%