-69.5% is the change from 505 to 154
Calculation steps:
[( 154 - 505 ) ÷ 505] x 100 = -69.5%
Formula
Percentage change = [(154 - 505) / 505] x 100
Subtract the new number by the original number
154 - 505 = -351
-351 ÷ 505 = -0.695049504950495
-0.695049504950495 x 100 = -69.5%