-39.12% is the change from 340 to 207
Calculation steps:
[( 207 - 340 ) ÷ 340] x 100 = -39.12%
Formula
Percentage change = [(207 - 340) / 340] x 100
Subtract the new number by the original number
207 - 340 = -133
-133 ÷ 340 = -0.3911764705882353
-0.3911764705882353 x 100 = -39.12%