-75% is the change from 192 to 48
Calculation steps:
[( 48 - 192 ) ÷ 192] x 100 = -75%
Formula
Percentage change = [(48 - 192) / 192] x 100
Subtract the new number by the original number
48 - 192 = -144
-144 ÷ 192 = -0.75
-0.75 x 100 = -75%
Example