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SAT Math skill page

SAT Percentages Practice

Turn SAT percent problems into multipliers, equations, and clean comparisons instead of guessing from answer choices.

Practice percentages in DolphinPractice questions
10-15 min practice time3 questions on pageProblem Solving and Data Analysis
Practice time10-15 min
Question bank3 questions
Best forProblem Solving and Data Analysis

What this tests

What to know for this SAT skill

Dolphin question bank

Practice your skill

Question 1 of 3Easy
What is 25% of 80?
  1. 10
  2. 20
  3. 25
  4. 40
Show answer and solution
Correct answerB. 20

Solution walkthrough

  1. 25% is one fourth.
  2. One fourth of 80 is 20.
Question 2 of 3Medium
A value increases by 20% from 50. What is the new value?
  1. 55
  2. 60
  3. 65
  4. 70
Show answer and solution
Correct answerB. 60

Solution walkthrough

  1. A 20% increase means multiply by 1.20.
  2. The new value is 50(1.20) = 60.
Question 3 of 3Hard
After a 15% discount, a jacket costs $68. What was the original price?
  1. $72
  2. $78
  3. $80
  4. $85
Show answer and solution
Correct answerC. $80

Solution walkthrough

  1. After a 15% discount, the sale price is 85% of the original.
  2. If 0.85p = 68, then p = 68 / 0.85 = 80.

Avoid these traps

Common mistakes on this skill

Adding instead of multiplying

Percent change is multiplicative. A 20% increase means multiply by 1.20, not just add 20.

Using the final value as the original

Reverse percent questions require solving from the final amount back to the starting amount.

Confusing percent with decimal form

Convert 15% to 0.15 and 85% to 0.85 before writing the equation.

Study plan

How to practice this skill in Dolphin

  1. Convert every percent into a decimal or fraction before calculating.
  2. Use 1 plus the rate for increases and 1 minus the rate for decreases.
  3. For reverse percentages, write an equation using the final value.
  4. Check whether the answer should be larger or smaller than the given value.
Practice percentages in Dolphin

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Skill cluster

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FAQ

Questions about SAT Percentages Practice

Are percentages common on SAT Math?

Yes. Percent questions appear in discounts, growth, data comparisons, and real-world word problems.

What is the fastest way to solve percent change?

Use a multiplier. For example, a 12% increase is multiplication by 1.12, and a 12% decrease is multiplication by 0.88.

Why do reverse percent questions feel harder?

They start with the final value, so you have to divide by the percent multiplier instead of multiplying forward.