-3.25% is the change from 308 to 298
Calculation steps:
[( 298 - 308 ) ÷ 308] x 100 = -3.25%
Formula
Percentage change = [(298 - 308) / 308] x 100
Subtract the new number by the original number
298 - 308 = -10
-10 ÷ 308 = -0.032467532467532464
-0.032467532467532464 x 100 = -3.25%