-83.57% is the change from 347 to 57
Calculation steps:
[( 57 - 347 ) ÷ 347] x 100 = -83.57%
Formula
Percentage change = [(57 - 347) / 347] x 100
Subtract the new number by the original number
57 - 347 = -290
-290 ÷ 347 = -0.8357348703170029
-0.8357348703170029 x 100 = -83.57%