# Lesson Worksheet: Finding Percents Mentally Mathematics

In this worksheet, we will practice mentally calculating a percentage of a number.

**Q1: **

By dividing by 10 and then multiplying by 3, calculate of 90 mentally.

**Q2: **

Naser wants to buy a pair of pants for $22. The clothing store, in which the pair of pants are shown, has a sale of . Naser estimates that he will save of $20 or an amount of $10. Will the amount he saves for the pants be more or less than $10?

- ALess
- BMore

**Q3: **

Given a student answers of the questions on an exam correctly and 10 questions incorrectly, what was the total number of questions on the exam?

**Q4: **

If Khalid answered of the questions on his quiz correctly, and the quiz had 10 questions, determine the number of questions he answered correctly.

**Q5: **

By dividing by 4, calculate of 900 mentally.

**Q6: **

By dividing by 2, calculate of 32 mentally.

**Q7: **

Khalid took a cab to work yesterday. If he left a tip of on the $19.64 fare, determine about how much the tip was.

- A$ 7.00
- B$ 5.00
- C$ 45.00
- D$ 15.00

**Q8: **

By dividing by 4 and multiplying by 3, calculate of 600 mentally.

**Q9: **

The school football team won of their matches. If they played 10 matches, how many matches did they lose?

**Q10: **

According to a survey, about of people prefer dark chocolate over white chocolate. Which of the numbers below is the nearest to the number of people who prefer dark chocolate out of 199 people?

- A50
- B190
- C149
- D140
- E100