-89.72% is the change from 496 to 51
Calculation steps:
[( 51 - 496 ) ÷ 496] x 100 = -89.72%
Formula
Percentage change = [(51 - 496) / 496] x 100
Subtract the new number by the original number
51 - 496 = -445
-445 ÷ 496 = -0.8971774193548387
-0.8971774193548387 x 100 = -89.72%