Question

Select all the pairs of ratios that form a proportion.

A. 1/6, 4/20
B. 7/9, 28/36
C. 14/18, 21/27
D. 30/80, 6/18

Answer 1

A.
\[\frac{ 4 }{ 20 }=\frac{ 1 }{ 5 }\]
B.
\[\frac{ 28 }{36 }\div \frac{ 4 }{ 4 }=\frac{ 7 }{ 9 }\]
C.
\[\frac{ 14 }{18 }\div \frac{ 2 }{2 }=\frac{ 7 }{ 9 }\]
\[\frac{ 21 }{ 27 }\div \frac{ 3 }{3 }=\frac{ 7 }{ 9 }\]
D.
\[\frac{ 30 }{ 80 }\div \frac{ 10 }{10 }=\frac{ 3 }{ 8 }\]
\[\frac{ 6 }{18 }\div \frac{ 6 }{ 6 }=\frac{ 1 }{ 3 }\]

Answer 2

So, B & C ?

Answer 3

YES