Bonjour

1)

a. 8/16 = (2 x 4) / (2 x 8) = 4/8 = (2 x 2) / (2 x 4) = 2/4 = (2 x 1) / (2 x 2) = 1/2

b. 24/28 = (2 x 12) / (2 x 14) = 12/14 = (2 x 6) / (2 x 7) = 6/7

c. 4/6 = (2 x 2) / (2 x 3) = 2/3

d. 10/20 = (2 x 5) / (2 x 10) = 5/10

e. 86/46 = (2 x 43) / (2 x 23) = 43/23.

2)

a. 10/25 = (5 x 2) / (5 x 5) = 2/5

b. 35/40 = (5 x 7) / (5 x 8) = 7/8

c. 50/15 = (5 x 10) / (5 x 3) = 10/3

d. 5/20 = (5 x 1) / (5 x 4) = 1/4

e. 105/55 = (5 x 21) / (5 x 11) = 21/11.

3)

a. 21/14 = (7 x 3) / (7 x 2) = 3/2

b. 49/7 = (7 x 7) / (7 x 1) = 7

c. 70/77 = (7 x 10) / (7 x 11) = 10/11

d. 63/42 = (7 x 9) / (7 x 6) = 9/6

e. 700/21 = (7 x 100) / (7 x 3) = 100/3.