-12.99% is the change from 670 to 583
Calculation steps:
[( 583 - 670 ) ÷ 670] x 100 = -12.99%
Formula
Percentage change = [(583 - 670) / 670] x 100
Subtract the new number by the original number
583 - 670 = -87
-87 ÷ 670 = -0.12985074626865672
-0.12985074626865672 x 100 = -12.99%