-82.46% is the change from 513 to 90
Calculation steps:
[( 90 - 513 ) ÷ 513] x 100 = -82.46%
Formula
Percentage change = [(90 - 513) / 513] x 100
Subtract the new number by the original number
90 - 513 = -423
-423 ÷ 513 = -0.8245614035087719
-0.8245614035087719 x 100 = -82.46%