J) Fill in the missing number. 70% of square =35

## Step 1: Set up the equation<br />### To find the missing number, we need to set up an equation based on the given percentage. We know that $70\%$ of some number equals $35$. This can be expressed as $\frac{70}{100} \times x = 35$, where $x$ is the missing number.<br /><br />## Step 2: Solve for the missing number<br />### Rearrange the equation to solve for $x$: <br />\[ x = \frac{35 \times 100}{70} \]<br /><br />## Step 3: Calculate the value of $x$<br />### Perform the calculation:<br />\[ x = \frac{3500}{70} = 50 \]