-75.55% is the change from 503 to 123
Calculation steps:
[( 123 - 503 ) ÷ 503] x 100 = -75.55%
Formula
Percentage change = [(123 - 503) / 503] x 100
Subtract the new number by the original number
123 - 503 = -380
-380 ÷ 503 = -0.7554671968190855
-0.7554671968190855 x 100 = -75.55%