-20.99% is the change from 972 to 768
Calculation steps:
[( 768 - 972 ) ÷ 972] x 100 = -20.99%
Formula
Percentage change = [(768 - 972) / 972] x 100
Subtract the new number by the original number
768 - 972 = -204
-204 ÷ 972 = -0.20987654320987653
-0.20987654320987653 x 100 = -20.99%