-97.33% is the change from 487 to 13
Calculation steps:
[( 13 - 487 ) ÷ 487] x 100 = -97.33%
Formula
Percentage change = [(13 - 487) / 487] x 100
Subtract the new number by the original number
13 - 487 = -474
-474 ÷ 487 = -0.973305954825462
-0.973305954825462 x 100 = -97.33%