-20.27% is the change from 671 to 535
Calculation steps:
[( 535 - 671 ) ÷ 671] x 100 = -20.27%
Formula
Percentage change = [(535 - 671) / 671] x 100
Subtract the new number by the original number
535 - 671 = -136
-136 ÷ 671 = -0.20268256333830104
-0.20268256333830104 x 100 = -20.27%