Answer: 35 is 70% of 50
Step-by-step explanation: 
Steps to solve "35 is 70 percent of what number?"
We have, 70% × x = 35
or, 
70
100
 × x = 35
Multiplying both sides by 100 and dividing both sides by 70,
we have x = 35 × 
100
70
x = 50
If you are using a calculator, simply enter 35×100÷70, which will give you the answer.