-98.7% is the change from 537 to 7
Calculation steps:
[( 7 - 537 ) ÷ 537] x 100 = -98.7%
Formula
Percentage change = [(7 - 537) / 537] x 100
Subtract the new number by the original number
7 - 537 = -530
-530 ÷ 537 = -0.9869646182495344
-0.9869646182495344 x 100 = -98.7%