-96.75% is the change from 308 to 10
Calculation steps:
[( 10 - 308 ) ÷ 308] x 100 = -96.75%
Formula
Percentage change = [(10 - 308) / 308] x 100
Subtract the new number by the original number
10 - 308 = -298
-298 ÷ 308 = -0.9675324675324676
-0.9675324675324676 x 100 = -96.75%