-70.82% is the change from 497 to 145
Calculation steps:
[( 145 - 497 ) ÷ 497] x 100 = -70.82%
Formula
Percentage change = [(145 - 497) / 497] x 100
Subtract the new number by the original number
145 - 497 = -352
-352 ÷ 497 = -0.7082494969818913
-0.7082494969818913 x 100 = -70.82%