-50.1% is the change from 485 to 242
Calculation steps:
[( 242 - 485 ) ÷ 485] x 100 = -50.1%
Formula
Percentage change = [(242 - 485) / 485] x 100
Subtract the new number by the original number
242 - 485 = -243
-243 ÷ 485 = -0.5010309278350515
-0.5010309278350515 x 100 = -50.1%