-47.34% is the change from 488 to 257
Calculation steps:
[( 257 - 488 ) ÷ 488] x 100 = -47.34%
Formula
Percentage change = [(257 - 488) / 488] x 100
Subtract the new number by the original number
257 - 488 = -231
-231 ÷ 488 = -0.4733606557377049
-0.4733606557377049 x 100 = -47.34%