-43.3% is the change from 485 to 275
Calculation steps:
[( 275 - 485 ) ÷ 485] x 100 = -43.3%
Formula
Percentage change = [(275 - 485) / 485] x 100
Subtract the new number by the original number
275 - 485 = -210
-210 ÷ 485 = -0.4329896907216495
-0.4329896907216495 x 100 = -43.3%