-33.17% is the change from 820 to 548
Calculation steps:
[( 548 - 820 ) ÷ 820] x 100 = -33.17%
Formula
Percentage change = [(548 - 820) / 820] x 100
Subtract the new number by the original number
548 - 820 = -272
-272 ÷ 820 = -0.33170731707317075
-0.33170731707317075 x 100 = -33.17%