-12.5% is the change from 392 to 343
Calculation steps:
[( 343 - 392 ) ÷ 392] x 100 = -12.5%
Formula
Percentage change = [(343 - 392) / 392] x 100
Subtract the new number by the original number
343 - 392 = -49
-49 ÷ 392 = -0.125
-0.125 x 100 = -12.5%