-94.71% is the change from 510 to 27
Calculation steps:
[( 27 - 510 ) ÷ 510] x 100 = -94.71%
Formula
Percentage change = [(27 - 510) / 510] x 100
Subtract the new number by the original number
27 - 510 = -483
-483 ÷ 510 = -0.9470588235294117
-0.9470588235294117 x 100 = -94.71%