-77.02% is the change from 631 to 145
Calculation steps:
[( 145 - 631 ) ÷ 631] x 100 = -77.02%
Formula
Percentage change = [(145 - 631) / 631] x 100
Subtract the new number by the original number
145 - 631 = -486
-486 ÷ 631 = -0.7702060221870047
-0.7702060221870047 x 100 = -77.02%