-96.6% is the change from 530 to 18
Calculation steps:
[( 18 - 530 ) ÷ 530] x 100 = -96.6%
Formula
Percentage change = [(18 - 530) / 530] x 100
Subtract the new number by the original number
18 - 530 = -512
-512 ÷ 530 = -0.9660377358490566
-0.9660377358490566 x 100 = -96.6%