-46.83% is the change from 521 to 277
Calculation steps:
[( 277 - 521 ) ÷ 521] x 100 = -46.83%
Formula
Percentage change = [(277 - 521) / 521] x 100
Subtract the new number by the original number
277 - 521 = -244
-244 ÷ 521 = -0.46833013435700577
-0.46833013435700577 x 100 = -46.83%