-69.79% is the change from 821 to 248
Calculation steps:
[( 248 - 821 ) ÷ 821] x 100 = -69.79%
Formula
Percentage change = [(248 - 821) / 821] x 100
Subtract the new number by the original number
248 - 821 = -573
-573 ÷ 821 = -0.6979293544457978
-0.6979293544457978 x 100 = -69.79%