-29.9% is the change from 505 to 354
Calculation steps:
[( 354 - 505 ) ÷ 505] x 100 = -29.9%
Formula
Percentage change = [(354 - 505) / 505] x 100
Subtract the new number by the original number
354 - 505 = -151
-151 ÷ 505 = -0.299009900990099
-0.299009900990099 x 100 = -29.9%