-87.71% is the change from 537 to 66
Calculation steps:
[( 66 - 537 ) ÷ 537] x 100 = -87.71%
Formula
Percentage change = [(66 - 537) / 537] x 100
Subtract the new number by the original number
66 - 537 = -471
-471 ÷ 537 = -0.8770949720670391
-0.8770949720670391 x 100 = -87.71%