-64.12% is the change from 340 to 122
Calculation steps:
[( 122 - 340 ) ÷ 340] x 100 = -64.12%
Formula
Percentage change = [(122 - 340) / 340] x 100
Subtract the new number by the original number
122 - 340 = -218
-218 ÷ 340 = -0.6411764705882353
-0.6411764705882353 x 100 = -64.12%