-34.84% is the change from 821 to 535
Calculation steps:
[( 535 - 821 ) ÷ 821] x 100 = -34.84%
Formula
Percentage change = [(535 - 821) / 821] x 100
Subtract the new number by the original number
535 - 821 = -286
-286 ÷ 821 = -0.34835566382460414
-0.34835566382460414 x 100 = -34.84%