-86.8% is the change from 538 to 71
Calculation steps:
[( 71 - 538 ) ÷ 538] x 100 = -86.8%
Formula
Percentage change = [(71 - 538) / 538] x 100
Subtract the new number by the original number
71 - 538 = -467
-467 ÷ 538 = -0.8680297397769516
-0.8680297397769516 x 100 = -86.8%