-47.12% is the change from 520 to 275
Calculation steps:
[( 275 - 520 ) ÷ 520] x 100 = -47.12%
Formula
Percentage change = [(275 - 520) / 520] x 100
Subtract the new number by the original number
275 - 520 = -245
-245 ÷ 520 = -0.47115384615384615
-0.47115384615384615 x 100 = -47.12%