4 3/4:1/4-2 3/14•7=?

Question

4 3/4:1/4-2 3/14•7=?

Answer 1

4 3/4 : 1/4 - 2 3/14 * 7 = 3 1/2
4 3/4 ÷ 1/4 - 2 3/14 * 7 = 19/4 ÷ 1/4 - 31/14 * 7 = 19/4 * 4 - 31/14 * 7 = 19 - 31/14 * 7 = 19 - 31/2=(19*2 - 31*1)/2 = (38 - 31)/2 = 7/2 = 3 1/2