-53.75% is the change from 320 to 148
Calculation steps:
[( 148 - 320 ) ÷ 320] x 100 = -53.75%
Formula
Percentage change = [(148 - 320) / 320] x 100
Subtract the new number by the original number
148 - 320 = -172
-172 ÷ 320 = -0.5375
-0.5375 x 100 = -53.75%