To solve the two problems you provided:
-
For the equation \( \frac{3}{7} = \frac{12}{d} \), you can find the missing denominator (d) by cross-multiplying:
\[ 3 \cdot d = 7 \cdot 12 \]
This simplifies to:
\[ 3d = 84 \]
Now, divide both sides by 3:
\[ d = \frac{84}{3} = 28 \]
So, the missing denominator is 28.
-
For the equation \( \frac{7}{10} = \frac{n}{100} \), you can find the missing numerator (n) by cross-multiplying again:
\[ 7 \cdot 100 = 10 \cdot n \]
This simplifies to:
\[ 700 = 10n \]
Now, divide both sides by 10:
\[ n = \frac{700}{10} = 70 \]
So, the missing numerator is 70.
In summary:
- The missing denominator is 28.
- The missing numerator is 70.