svetazuna

Verified answer

(7 - 1 5/12) : 6,7 = 5 7/12 : 67/10 = 67/12 * 10/67 = 10/12 = 5/6,

 (5,75 - 3 1/6) : 15,5 = (575/100 - 19/6) : 155/10 = 
= (1725/300 - 950/300) * 10/155 = 775/300 * 10/155 = 1/6