-36.21% is the change from 671 to 428
Calculation steps:
[( 428 - 671 ) ÷ 671] x 100 = -36.21%
Formula
Percentage change = [(428 - 671) / 671] x 100
Subtract the new number by the original number
428 - 671 = -243
-243 ÷ 671 = -0.3621460506706408
-0.3621460506706408 x 100 = -36.21%