-10.23% is the change from 342 to 307
Calculation steps:
[( 307 - 342 ) ÷ 342] x 100 = -10.23%
Formula
Percentage change = [(307 - 342) / 342] x 100
Subtract the new number by the original number
307 - 342 = -35
-35 ÷ 342 = -0.1023391812865497
-0.1023391812865497 x 100 = -10.23%