-73.16% is the change from 503 to 135
Calculation steps:
[( 135 - 503 ) ÷ 503] x 100 = -73.16%
Formula
Percentage change = [(135 - 503) / 503] x 100
Subtract the new number by the original number
135 - 503 = -368
-368 ÷ 503 = -0.731610337972167
-0.731610337972167 x 100 = -73.16%