-1.3% is the change from 308 to 304
Calculation steps:
[( 304 - 308 ) ÷ 308] x 100 = -1.3%
Formula
Percentage change = [(304 - 308) / 308] x 100
Subtract the new number by the original number
304 - 308 = -4
-4 ÷ 308 = -0.012987012987012988
-0.012987012987012988 x 100 = -1.3%