a) 8/14 simplifies to 4/7, 20/35 simplifies to 4/7, so these form a true proportion
b) 6/10 simplifies to 3/5, 15/25 simplifies to 3/5, so these form a true proportion
c) 9/4 is already simplified, 36/16 simplifies to 9/4, so these form a true proportion
d) 12/15 simplifies to 4/5, 30/40 simplifies to 3/4, so these don't form a true proportion
Therefore, the correct option is D
Which pair of ratios does not form a true proportion?
a. 8:14 and 20:35
b. 6 to 10 and 15 to 25
c. 9/4 and 36/16
d. 12:15 and 30:40
1 answer