-66% is the change from 906 to 308
Calculation steps:
[( 308 - 906 ) ÷ 906] x 100 = -66%
Formula
Percentage change = [(308 - 906) / 906] x 100
Subtract the new number by the original number
308 - 906 = -598
-598 ÷ 906 = -0.6600441501103753
-0.6600441501103753 x 100 = -66%