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Sameer claims $\frac{7}{9}$ and $\frac{21}{28}$ are equivalent.
Check using cross products $7 \times 28$ and $9 \times 21$ .
What do you find?

Class 7Equivalent Rational NumbersRational Numbers

A196 and 189, not equivalent
B196 and 196, equivalent
C189 and 189, equivalent
D63 and 84, equivalent

Step-by-Step Solution

7 \times 28 = 196

and

9 \times 21 = 189

. The products differ, so

\frac{7}{9}

and

\frac{21}{28}

are NOT equivalent.

Answer: A) 196 and 189, not equivalent

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