20% of the people in a plane are foreigners.If 140 people in the plane are foreigners, find the total number of people in the plane.

To find the total number of people in the plane, you can follow these steps:

1. First, understand that "20% of the people in a plane are foreigners" means that the foreigners represent 20 out of every 100 people in the plane.

2. You know that there are 140 foreigners in the plane. This number represents the 20% of the total number of people in the plane.

3. To find the total number of people, you need to calculate what number 140 is 20% of.

4. To do this, you can use the formula for finding the whole from a percentage:

   Whole = (Percentage / 100) * Part

   In this case, the 'Part' is the number of foreigners (140) and the 'Percentage' is 20.

5. Rearrange the formula to solve for 'Whole':

   Whole = Part / (Percentage / 100)

6. Substitute the given values into the formula:

   Whole = 140 / (20 / 100)

7. Simplify the equation:

   Whole = 140 / 0.2

8. Solve the equation:

   Whole = 700

So, there are 700 people in total on the plane.