-20.18% is the change from 342 to 273
Calculation steps:
[( 273 - 342 ) ÷ 342] x 100 = -20.18%
Formula
Percentage change = [(273 - 342) / 342] x 100
Subtract the new number by the original number
273 - 342 = -69
-69 ÷ 342 = -0.20175438596491227
-0.20175438596491227 x 100 = -20.18%