-71.22% is the change from 344 to 99
Calculation steps:
[( 99 - 344 ) ÷ 344] x 100 = -71.22%
Formula
Percentage change = [(99 - 344) / 344] x 100
Subtract the new number by the original number
99 - 344 = -245
-245 ÷ 344 = -0.7122093023255814
-0.7122093023255814 x 100 = -71.22%