2 1/2s - 1/2d

Answer 1

2 1/2 = 2 + 1 / 2 = 4 / 2 + 1 2 = 5 / 2

2 1/2 s - 1 / 2 d = 5 / 2 s - 1 / 2 d = ( 1 / 2 ) ( 5 s - d ) = ( 5 s - d ) / 2