= 9 - (2/3) + 67 - 24 - (2 + 1/4)
= 9 - (2/3) + 67 - 24 - (9/4)
= 9 - 2/3 + 67 - 24 - 9/4
= 603/15 - 10/15 + 1005/15 - 360/15 - 135/60
= (603 - 10 + 1005 - 360 - 135) / 15
= 1103 / 15
= 73.53