Помогите пожалуйста номер 279

Question

Помогите пожалуйста номер 279

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Answer 1

6/18 = 1/3
3/21 = 1/7
4/16 = 1/4
3/12 = 1/4
3/9 = 1/3
21/28 = 3/4
18/45 = 6/15 

Comments

18/45 = 2/5 *

Answer 2

6/18=1/3
3/21=1/7
4/16=1/4
3/12=1/4
3/9=1/3
21/28=3/4
18/45=2/5