-30.29% is the change from 340 to 237
Calculation steps:
[( 237 - 340 ) ÷ 340] x 100 = -30.29%
Formula
Percentage change = [(237 - 340) / 340] x 100
Subtract the new number by the original number
237 - 340 = -103
-103 ÷ 340 = -0.3029411764705882
-0.3029411764705882 x 100 = -30.29%