-34.44% is the change from 392 to 257
Calculation steps:
[( 257 - 392 ) ÷ 392] x 100 = -34.44%
Formula
Percentage change = [(257 - 392) / 392] x 100
Subtract the new number by the original number
257 - 392 = -135
-135 ÷ 392 = -0.34438775510204084
-0.34438775510204084 x 100 = -34.44%