-69.18% is the change from 503 to 155
Calculation steps:
[( 155 - 503 ) ÷ 503] x 100 = -69.18%
Formula
Percentage change = [(155 - 503) / 503] x 100
Subtract the new number by the original number
155 - 503 = -348
-348 ÷ 503 = -0.6918489065606361
-0.6918489065606361 x 100 = -69.18%