-18.96% is the change from 670 to 543
Calculation steps:
[( 543 - 670 ) ÷ 670] x 100 = -18.96%
Formula
Percentage change = [(543 - 670) / 670] x 100
Subtract the new number by the original number
543 - 670 = -127
-127 ÷ 670 = -0.18955223880597014
-0.18955223880597014 x 100 = -18.96%