-39.78% is the change from 827 to 498
Calculation steps:
[( 498 - 827 ) ÷ 827] x 100 = -39.78%
Formula
Percentage change = [(498 - 827) / 827] x 100
Subtract the new number by the original number
498 - 827 = -329
-329 ÷ 827 = -0.3978234582829504
-0.3978234582829504 x 100 = -39.78%