-52.5% is the change from 520 to 247
Calculation steps:
[( 247 - 520 ) ÷ 520] x 100 = -52.5%
Formula
Percentage change = [(247 - 520) / 520] x 100
Subtract the new number by the original number
247 - 520 = -273
-273 ÷ 520 = -0.525
-0.525 x 100 = -52.5%