-97.53% is the change from 527 to 13
Calculation steps:
[( 13 - 527 ) ÷ 527] x 100 = -97.53%
Formula
Percentage change = [(13 - 527) / 527] x 100
Subtract the new number by the original number
13 - 527 = -514
-514 ÷ 527 = -0.9753320683111955
-0.9753320683111955 x 100 = -97.53%