-48.92% is the change from 507 to 259
Calculation steps:
[( 259 - 507 ) ÷ 507] x 100 = -48.92%
Formula
Percentage change = [(259 - 507) / 507] x 100
Subtract the new number by the original number
259 - 507 = -248
-248 ÷ 507 = -0.4891518737672584
-0.4891518737672584 x 100 = -48.92%