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Percent Knowledge-Based Practice

Math · Ratios, Proportions & Percent · Math · Ratios, Rates & Percent

18 Math practice questions on Percent. Questions that assess core concepts and understanding.

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Questions

  1. 1.

    What number increased by 25% of itself is equal to 45% of 400?

    • A) 135
    • B) 144
    • C) 150
    • D) 180
  2. 2.

    The sum of two positive numbers is 280. If 40% of the first number is equal to 30% of the second number, what is the value of the first number?

    • A) 120
    • B) 140
    • C) 160
    • D) 105
  3. 3.

    If AA is 20% greater than BB, and BB is 25% less than CC, what percent of CC is AA?

    • A) 80%
    • B) 85%
    • C) 90%
    • D) 95%
  4. 4.

    The difference between 72% of a number and 48% of the same number is 84. What is the number?

    • A) 350
    • B) 300
    • C) 375
    • D) 420
  5. 5.

    What percent of 140 is 175?

    • A) 25%
    • B) 80%
    • C) 125%
    • D) 75%
  6. 6.

    If the length and width of a rectangle are each increased by 20%, by what percent does the area of the rectangle increase?

    • A) 20%
    • B) 40%
    • C) 144%
    • D) 44%
  7. 7.

    When a number is decreased by 35%, the result is 260. What is the original number?

    • A) 351
    • B) 400
    • C) 429
    • D) 455
  8. 8.

    In a group of students, 60% are female and the rest are male. If 30% of the females and 45% of the males wear glasses, what percent of the entire group wears glasses?

    • A) 36%
    • B) 37.5%
    • C) 39%
    • D) 75%
  9. 9.

    A metal alloy weighing 480 grams contains 65% copper, 20% zinc, and the remainder is nickel. How many grams of nickel are in the alloy?

    • A) 15 grams
    • B) 60 grams
    • C) 72 grams
    • D) 96 grams
  10. 10.

    A chemist prepares a solution by mixing 15 mL of pure alcohol with 60 mL of water. What percent of the total solution is alcohol?

    • A) 15%
    • B) 25%
    • C) 20%
    • D) 80%
  11. 11.

    A jar contains only red and blue marbles. If 35% of the marbles are red and there are 24 more blue marbles than red marbles, how many total marbles are in the jar?

    • A) 80
    • B) 60
    • C) 70
    • D) 120
  12. 12.

    If 60% of a positive number xx is equal to 75% of a positive number yy, what percent of xx is yy?

    • A) 80%
    • B) 125%
    • C) 15%
    • D) 45%
  13. 13.

    An item is discounted by 20%, and the discounted price is then reduced by an additional 15%. What single percentage discount on the original price is equivalent to these two successive discounts?

    • A) 32%
    • B) 35%
    • C) 30%
    • D) 28%
  14. 14.

    What is 35% of 80% of 250?

    • A) 70
    • B) 87.5
    • C) 100
    • D) 140
  15. 15.

    A company produced 120 bicycles in May and increased its production by 45% in June. How many bicycles did the company produce in June?

    • A) 54 bicycles
    • B) 165 bicycles
    • C) 168 bicycles
    • D) 174 bicycles
  16. 16.

    On a 40-question exam, a student answered 34 questions correctly and the remaining questions incorrectly. What percent of the questions did the student answer incorrectly?

    • A) 15%
    • B) 85%
    • C) 6%
    • D) 20%
  17. 17.

    A value decreases from 250 to 210. What is the percent decrease?

    • A) 14%
    • B) 16%
    • C) 19%
    • D) 40%
  18. 18.

    If 85 is 68% of a certain number, what is the value of that number?

    • A) 57.8
    • B) 117
    • C) 125
    • D) 153

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