-21.35% is the change from 431 to 339
Calculation steps:
[( 339 - 431 ) ÷ 431] x 100 = -21.35%
Formula
Percentage change = [(339 - 431) / 431] x 100
Subtract the new number by the original number
339 - 431 = -92
-92 ÷ 431 = -0.21345707656612528
-0.21345707656612528 x 100 = -21.35%