-49.48% is the change from 287 to 145
Calculation steps:
[( 145 - 287 ) ÷ 287] x 100 = -49.48%
Formula
Percentage change = [(145 - 287) / 287] x 100
Subtract the new number by the original number
145 - 287 = -142
-142 ÷ 287 = -0.49477351916376305
-0.49477351916376305 x 100 = -49.48%