-26.15% is the change from 348 to 257
Calculation steps:
[( 257 - 348 ) ÷ 348] x 100 = -26.15%
Formula
Percentage change = [(257 - 348) / 348] x 100
Subtract the new number by the original number
257 - 348 = -91
-91 ÷ 348 = -0.2614942528735632
-0.2614942528735632 x 100 = -26.15%