-74.25% is the change from 998 to 257
Calculation steps:
[( 257 - 998 ) ÷ 998] x 100 = -74.25%
Formula
Percentage change = [(257 - 998) / 998] x 100
Subtract the new number by the original number
257 - 998 = -741
-741 ÷ 998 = -0.7424849699398798
-0.7424849699398798 x 100 = -74.25%