-80.9% is the change from 513 to 98
Calculation steps:
[( 98 - 513 ) ÷ 513] x 100 = -80.9%
Formula
Percentage change = [(98 - 513) / 513] x 100
Subtract the new number by the original number
98 - 513 = -415
-415 ÷ 513 = -0.8089668615984406
-0.8089668615984406 x 100 = -80.9%