# 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