-45.35% is the change from 505 to 276
Calculation steps:
[( 276 - 505 ) ÷ 505] x 100 = -45.35%
Formula
Percentage change = [(276 - 505) / 505] x 100
Subtract the new number by the original number
276 - 505 = -229
-229 ÷ 505 = -0.4534653465346535
-0.4534653465346535 x 100 = -45.35%