-9.61% is the change from 645 to 583
Calculation steps:
[( 583 - 645 ) ÷ 645] x 100 = -9.61%
Formula
Percentage change = [(583 - 645) / 645] x 100
Subtract the new number by the original number
583 - 645 = -62
-62 ÷ 645 = -0.09612403100775194
-0.09612403100775194 x 100 = -9.61%