-15.52% is the change from 670 to 566
Calculation steps:
[( 566 - 670 ) ÷ 670] x 100 = -15.52%
Formula
Percentage change = [(566 - 670) / 670] x 100
Subtract the new number by the original number
566 - 670 = -104
-104 ÷ 670 = -0.15522388059701492
-0.15522388059701492 x 100 = -15.52%