280/700 = 40%
A fraction like 280/700 can show up when 280 seats out of 700 are filled, or when 280 students out of 700 complete a survey. That amount is 40%, so it could describe attendance, progress on a project, or the portion of a budget that has been spent.
To picture 40% quickly, imagine 10 equal parts and shade 4 of them. It is a little less than half, since half would be 50%, or 5 out of 10 parts.
A common mistake is to think 280/700 means 280%, because the numerator is 280. The fraction compares 280 with the total of 700, so the value is less than one whole, or less than 100%.