-81.51% is the change from 503 to 93
Calculation steps:
[( 93 - 503 ) ÷ 503] x 100 = -81.51%
Formula
Percentage change = [(93 - 503) / 503] x 100
Subtract the new number by the original number
93 - 503 = -410
-410 ÷ 503 = -0.8151093439363817
-0.8151093439363817 x 100 = -81.51%