-91.73% is the change from 520 to 43
Calculation steps:
[( 43 - 520 ) ÷ 520] x 100 = -91.73%
Formula
Percentage change = [(43 - 520) / 520] x 100
Subtract the new number by the original number
43 - 520 = -477
-477 ÷ 520 = -0.9173076923076923
-0.9173076923076923 x 100 = -91.73%