2 1/7 :B=2 19/28:3 3/4

Question

2 1/7 :B=2 19/28:3 3/4

Answer 1

2 1/7 :в = 2 19/28 : 3 3/4
15/7 : в = 75/28 : 15/4
15/7 : в = 75/28 * 4/15 = 5/7
в = 15/7 : 5/7 = 15/7 * 7/5 = 3