-80.72% is the change from 503 to 97
Calculation steps:
[( 97 - 503 ) ÷ 503] x 100 = -80.72%
Formula
Percentage change = [(97 - 503) / 503] x 100
Subtract the new number by the original number
97 - 503 = -406
-406 ÷ 503 = -0.8071570576540755
-0.8071570576540755 x 100 = -80.72%