-84.72% is the change from 530 to 81
Calculation steps:
[( 81 - 530 ) ÷ 530] x 100 = -84.72%
Formula
Percentage change = [(81 - 530) / 530] x 100
Subtract the new number by the original number
81 - 530 = -449
-449 ÷ 530 = -0.8471698113207548
-0.8471698113207548 x 100 = -84.72%