-80.18% is the change from 671 to 133
Calculation steps:
[( 133 - 671 ) ÷ 671] x 100 = -80.18%
Formula
Percentage change = [(133 - 671) / 671] x 100
Subtract the new number by the original number
133 - 671 = -538
-538 ÷ 671 = -0.8017883755588674
-0.8017883755588674 x 100 = -80.18%