-47.12% is the change from 486 to 257
Calculation steps:
[( 257 - 486 ) ÷ 486] x 100 = -47.12%
Formula
Percentage change = [(257 - 486) / 486] x 100
Subtract the new number by the original number
257 - 486 = -229
-229 ÷ 486 = -0.4711934156378601
-0.4711934156378601 x 100 = -47.12%