-90.45% is the change from 513 to 49
Calculation steps:
[( 49 - 513 ) ÷ 513] x 100 = -90.45%
Formula
Percentage change = [(49 - 513) / 513] x 100
Subtract the new number by the original number
49 - 513 = -464
-464 ÷ 513 = -0.9044834307992202
-0.9044834307992202 x 100 = -90.45%