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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 Dolphin Try examples
10-15 min practice time 3 examples on page Problem Solving and Data Analysis
Practice time 10-15 min
On-page examples 3 examples
Best for Problem Solving and Data Analysis

What this tests

What to know for this SAT skill

Practice examples

Try a few SAT-style questions

Example 1 Easy

What is 25% of 80?

  1. 10
  2. 20
  3. 25
  4. 40
Show answer and explanation

Answer: 20

25% is one fourth. One fourth of 80 is 20.

Example 2 Medium

A value increases by 20% from 50. What is the new value?

  1. 55
  2. 60
  3. 65
  4. 70
Show answer and explanation

Answer: 60

A 20% increase means multiply by 1.20. The new value is 50(1.20) = 60.

Example 3 Hard

After a 15% discount, a jacket costs $68. What was the original price?

  1. $72
  2. $78
  3. $80
  4. $85
Show answer and explanation

Answer: $80

After a 15% discount, the sale price is 85% of the original. 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

Related practice

Build the surrounding skills

SAT Ratios and Proportions PracticeSAT Probability PracticeSAT Linear Equations PracticeSAT Math skill hub

Skill cluster

Keep practicing SAT Math

SAT Math skill hub SAT Linear Equations PracticeSAT Systems of Equations PracticeSAT Linear Functions PracticeSAT Quadratic Equations PracticeSAT Ratios and Proportions PracticeSAT Probability PracticeSAT Geometry PracticeSAT Right Triangles PracticeSAT Data Analysis PracticeSAT Circle Equations Practice SAT Reading and Writing Practice Pages Dolphin SAT study guides SAT score guides by college

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.