-90.63% is the change from 512 to 48
Calculation steps:
[( 48 - 512 ) ÷ 512] x 100 = -90.63%
Formula
Percentage change = [(48 - 512) / 512] x 100
Subtract the new number by the original number
48 - 512 = -464
-464 ÷ 512 = -0.90625
-0.90625 x 100 = -90.63%