-94.25% is the change from 643 to 37
Calculation steps:
[( 37 - 643 ) ÷ 643] x 100 = -94.25%
Formula
Percentage change = [(37 - 643) / 643] x 100
Subtract the new number by the original number
37 - 643 = -606
-606 ÷ 643 = -0.942457231726283
-0.942457231726283 x 100 = -94.25%