-34.09% is the change from 220 to 145
Calculation steps:
[( 145 - 220 ) ÷ 220] x 100 = -34.09%
Formula
Percentage change = [(145 - 220) / 220] x 100
Subtract the new number by the original number
145 - 220 = -75
-75 ÷ 220 = -0.3409090909090909
-0.3409090909090909 x 100 = -34.09%