To find out how many students 35 represents 70% of, you can set up the equation:
\[ 0.70 \times X = 35 \]
Where \( X \) represents the total number of students. To solve for \( X \), divide both sides of the equation by 0.70:
\[ X = \frac{35}{0.70} \]
Calculating that gives:
\[ X = 50 \]
So, 35 students is 70% of 50 students.