-63.75% is the change from 400 to 145
Calculation steps:
[( 145 - 400 ) ÷ 400] x 100 = -63.75%
Formula
Percentage change = [(145 - 400) / 400] x 100
Subtract the new number by the original number
145 - 400 = -255
-255 ÷ 400 = -0.6375
-0.6375 x 100 = -63.75%