-98.32% is the change from 537 to 9
Calculation steps:
[( 9 - 537 ) ÷ 537] x 100 = -98.32%
Formula
Percentage change = [(9 - 537) / 537] x 100
Subtract the new number by the original number
9 - 537 = -528
-528 ÷ 537 = -0.9832402234636871
-0.9832402234636871 x 100 = -98.32%