-83.62% is the change from 348 to 57
Calculation steps:
[( 57 - 348 ) ÷ 348] x 100 = -83.62%
Formula
Percentage change = [(57 - 348) / 348] x 100
Subtract the new number by the original number
57 - 348 = -291
-291 ÷ 348 = -0.8362068965517241
-0.8362068965517241 x 100 = -83.62%