-93.97% is the change from 348 to 21
Calculation steps:
[( 21 - 348 ) ÷ 348] x 100 = -93.97%
Formula
Percentage change = [(21 - 348) / 348] x 100
Subtract the new number by the original number
21 - 348 = -327
-327 ÷ 348 = -0.9396551724137931
-0.9396551724137931 x 100 = -93.97%