-45.13% is the change from 503 to 276
Calculation steps:
[( 276 - 503 ) ÷ 503] x 100 = -45.13%
Formula
Percentage change = [(276 - 503) / 503] x 100
Subtract the new number by the original number
276 - 503 = -227
-227 ÷ 503 = -0.45129224652087474
-0.45129224652087474 x 100 = -45.13%