-91.44% is the change from 397 to 34
Calculation steps:
[( 34 - 397 ) ÷ 397] x 100 = -91.44%
Formula
Percentage change = [(34 - 397) / 397] x 100
Subtract the new number by the original number
34 - 397 = -363
-363 ÷ 397 = -0.9143576826196473
-0.9143576826196473 x 100 = -91.44%