itu nomor satu apa jawabannya yah dengan cara ya terima kasih

3¼ + ⅝ : 5/12 - 3 2/5
= 13/4 + 5/8 : 5/12 - 17/5
= 13/4 + 5/8 × 12/5 - 17/5
= 13/4 + 3/2 - 17/5
= 65/20 + 30/20 - 68/20
= 95/20 - 68/20
= 27/20
= 1 7/20 (A)