Question

приведите дробь 2/7 к знаменателю14,21,35,140

Answer 1

14 - 4/14, 
21 - 6/21, 
35 - 10/35, 
140 - 40/140

Answer 2

2/7=4/14; 2/7=6/21; 2/7=10/35; 2/7=40/140