-81.15% is the change from 520 to 98
Calculation steps:
[( 98 - 520 ) ÷ 520] x 100 = -81.15%
Formula
Percentage change = [(98 - 520) / 520] x 100
Subtract the new number by the original number
98 - 520 = -422
-422 ÷ 520 = -0.8115384615384615
-0.8115384615384615 x 100 = -81.15%