-64.24% is the change from 344 to 123
Calculation steps:
[( 123 - 344 ) ÷ 344] x 100 = -64.24%
Formula
Percentage change = [(123 - 344) / 344] x 100
Subtract the new number by the original number
123 - 344 = -221
-221 ÷ 344 = -0.6424418604651163
-0.6424418604651163 x 100 = -64.24%