-0.97% is the change from 310 to 307
Calculation steps:
[( 307 - 310 ) ÷ 310] x 100 = -0.97%
Formula
Percentage change = [(307 - 310) / 310] x 100
Subtract the new number by the original number
307 - 310 = -3
-3 ÷ 310 = -0.00967741935483871
-0.00967741935483871 x 100 = -0.97%