-75% is the change from 768 to 192
Calculation steps:
[( 192 - 768 ) ÷ 768] x 100 = -75%
Formula
Percentage change = [(192 - 768) / 768] x 100
Subtract the new number by the original number
192 - 768 = -576
-576 ÷ 768 = -0.75
-0.75 x 100 = -75%
Example