Study on the flySATMathPercentages

Math

Percentages — SAT practice questions

  • 120 practice questions in the app
  • Free

What this topic is

Percentages questions ask for a part as a percent of a whole, a whole from a part, or a percent increase or decrease.

The key distinction is the base. Percent change is the difference divided by the original value, not the new one, so growing from a small number to a much larger one can be an increase of several hundred percent. Successive changes multiply rather than add: a rise of ten percent followed by a fall of ten percent leaves the value slightly below where it started.

Many answers are entered directly as a number instead of chosen.

Sample questions

Pick an answer to see whether it is right — nothing is saved, and nothing needs an account.

Question 1Easier

Of the 425 vehicles in a parking lot, 68 are trucks. What percentage of the vehicles are trucks?

Show answer

Answer: B — 16%

68/425=0.16=16%.

Question 2Easier

252 is p% greater than 36. What is the value of p?

Show answer

Answer: C — 600

252=36(1+p/100)⇒252/36=7=1+p/100⇒p=600.

Question 3Easier

A fruit basket contains only apples and oranges. There are 48 apples and 32 oranges. What percent of the fruit in the basket is oranges?

Show answer

Answer: B — 40%

Total =48+32=80, and 32/80=0.40=40%.

Every question is picked for where you are right now, wrong answers come back until they stick, and it all works offline.

Practice 120 Percentages questions in the app

More SAT topics

Harder than the exam: SAT Challenge · Competition-style problems

Everything on the SAT