Working for 8.5 subtract 1/25
8.5 - 1/2585/10 - 1/25 LCM of 10 and 25 is 50(85/10)(5/5) - (1/25)(2/2)425/50 - 2/50= (425 - 2)/50= 423/50= 8 23/50 or 8.46Hope this helps.