-48.56% is the change from 521 to 268
Calculation steps:
[( 268 - 521 ) ÷ 521] x 100 = -48.56%
Formula
Percentage change = [(268 - 521) / 521] x 100
Subtract the new number by the original number
268 - 521 = -253
-253 ÷ 521 = -0.4856046065259117
-0.4856046065259117 x 100 = -48.56%