-20.41% is the change from 343 to 273
Calculation steps:
[( 273 - 343 ) ÷ 343] x 100 = -20.41%
Formula
Percentage change = [(273 - 343) / 343] x 100
Subtract the new number by the original number
273 - 343 = -70
-70 ÷ 343 = -0.20408163265306123
-0.20408163265306123 x 100 = -20.41%