-45.33% is the change from 503 to 275
Calculation steps:
[( 275 - 503 ) ÷ 503] x 100 = -45.33%
Formula
Percentage change = [(275 - 503) / 503] x 100
Subtract the new number by the original number
275 - 503 = -228
-228 ÷ 503 = -0.4532803180914513
-0.4532803180914513 x 100 = -45.33%