-1.29% is the change from 311 to 307
Calculation steps:
[( 307 - 311 ) ÷ 311] x 100 = -1.29%
Formula
Percentage change = [(307 - 311) / 311] x 100
Subtract the new number by the original number
307 - 311 = -4
-4 ÷ 311 = -0.012861736334405145
-0.012861736334405145 x 100 = -1.29%