A ladder 52 feet long stands against a straight tree, so that the foot of the ladder is 20 feet from the foot of the tree. How many feet up
the tree does the ladder extend? Round your answer to the nearest
whole number. (Enter your answer without units.)

36%

Step-by-step explanation:

The rent paid is a percentage of the net income earned by the student. Logically, if the rate for the rent was at $450 per month for 12 months, this makes $5400 a year in rent.

If the annual income was $15000, the percent of his income is spent on rent

= ($5400/$15000) × 100%

= 36%

It means he spent 36% of his income on rent.