7 1/3:21/2=3 2/3:y помогите

7 целых1/ 3: 21/2 = 3 целых 2/3 :у22/3 : 21/2  = 11/ 3у22/3 х 2/21= 11/3у44/63 = 11/3уу = 44/63 : 11/3у = 44/63 х 3/11у = 4/21