-61.24% is the change from 663 to 257
Calculation steps:
[( 257 - 663 ) ÷ 663] x 100 = -61.24%
Formula
Percentage change = [(257 - 663) / 663] x 100
Subtract the new number by the original number
257 - 663 = -406
-406 ÷ 663 = -0.6123680241327301
-0.6123680241327301 x 100 = -61.24%