-51.72% is the change from 667 to 322
Calculation steps:
[( 322 - 667 ) ÷ 667] x 100 = -51.72%
Formula
Percentage change = [(322 - 667) / 667] x 100
Subtract the new number by the original number
322 - 667 = -345
-345 ÷ 667 = -0.5172413793103449
-0.5172413793103449 x 100 = -51.72%