-67.99% is the change from 503 to 161
Calculation steps:
[( 161 - 503 ) ÷ 503] x 100 = -67.99%
Formula
Percentage change = [(161 - 503) / 503] x 100
Subtract the new number by the original number
161 - 503 = -342
-342 ÷ 503 = -0.679920477137177
-0.679920477137177 x 100 = -67.99%