-17.01% is the change from 670 to 556
Calculation steps:
[( 556 - 670 ) ÷ 670] x 100 = -17.01%
Formula
Percentage change = [(556 - 670) / 670] x 100
Subtract the new number by the original number
556 - 670 = -114
-114 ÷ 670 = -0.1701492537313433
-0.1701492537313433 x 100 = -17.01%