-52.59% is the change from 521 to 247
Calculation steps:
[( 247 - 521 ) ÷ 521] x 100 = -52.59%
Formula
Percentage change = [(247 - 521) / 521] x 100
Subtract the new number by the original number
247 - 521 = -274
-274 ÷ 521 = -0.525911708253359
-0.525911708253359 x 100 = -52.59%