-49.18% is the change from 978 to 497
Calculation steps:
[( 497 - 978 ) ÷ 978] x 100 = -49.18%
Formula
Percentage change = [(497 - 978) / 978] x 100
Subtract the new number by the original number
497 - 978 = -481
-481 ÷ 978 = -0.4918200408997955
-0.4918200408997955 x 100 = -49.18%