-34.96% is the change from 821 to 534
Calculation steps:
[( 534 - 821 ) ÷ 821] x 100 = -34.96%
Formula
Percentage change = [(534 - 821) / 821] x 100
Subtract the new number by the original number
534 - 821 = -287
-287 ÷ 821 = -0.34957369062119364
-0.34957369062119364 x 100 = -34.96%