-96.73% is the change from 306 to 10
Calculation steps:
[( 10 - 306 ) ÷ 306] x 100 = -96.73%
Formula
Percentage change = [(10 - 306) / 306] x 100
Subtract the new number by the original number
10 - 306 = -296
-296 ÷ 306 = -0.9673202614379085
-0.9673202614379085 x 100 = -96.73%