-90.79% is the change from 521 to 48
Calculation steps:
[( 48 - 521 ) ÷ 521] x 100 = -90.79%
Formula
Percentage change = [(48 - 521) / 521] x 100
Subtract the new number by the original number
48 - 521 = -473
-473 ÷ 521 = -0.9078694817658349
-0.9078694817658349 x 100 = -90.79%