-66.72% is the change from 643 to 214
Calculation steps:
[( 214 - 643 ) ÷ 643] x 100 = -66.72%
Formula
Percentage change = [(214 - 643) / 643] x 100
Subtract the new number by the original number
214 - 643 = -429
-429 ÷ 643 = -0.6671850699844479
-0.6671850699844479 x 100 = -66.72%