-94.34% is the change from 671 to 38
Calculation steps:
[( 38 - 671 ) ÷ 671] x 100 = -94.34%
Formula
Percentage change = [(38 - 671) / 671] x 100
Subtract the new number by the original number
38 - 671 = -633
-633 ÷ 671 = -0.9433681073025335
-0.9433681073025335 x 100 = -94.34%