-85.71% is the change from 497 to 71
Calculation steps:
[( 71 - 497 ) ÷ 497] x 100 = -85.71%
Formula
Percentage change = [(71 - 497) / 497] x 100
Subtract the new number by the original number
71 - 497 = -426
-426 ÷ 497 = -0.8571428571428571
-0.8571428571428571 x 100 = -85.71%