Bonjour
a. 3/5 = (3 x 7) / (5 x 7) = 21/35
b. 3/4 = (3 x 15) / (4 x 15) = 45/60
c. 80/100 = (80 : 20) / (100 : 20) = 4/5
d. 49/21 = (49 : 7) / (21 : 7) = 7/3.
Bonjour,
a. 3 / 5 = 3 × 7 / 5 × 7 = 21 / 35
b. 3 / 4 = 3 × 15 / 4 × 15 = 45 / 60
c. 80 / 100 = 80 ÷ 20 / 100 ÷ 20 = 4 / 5
d. 49 / 21 = 49 ÷ 7 / 21 ÷ 7 = 7 / 3
