-0.98% is the change from 306 to 303
Calculation steps:
[( 303 - 306 ) ÷ 306] x 100 = -0.98%
Formula
Percentage change = [(303 - 306) / 306] x 100
Subtract the new number by the original number
303 - 306 = -3
-3 ÷ 306 = -0.00980392156862745
-0.00980392156862745 x 100 = -0.98%