-19.24% is the change from 343 to 277
Calculation steps:
[( 277 - 343 ) ÷ 343] x 100 = -19.24%
Formula
Percentage change = [(277 - 343) / 343] x 100
Subtract the new number by the original number
277 - 343 = -66
-66 ÷ 343 = -0.1924198250728863
-0.1924198250728863 x 100 = -19.24%