Finding Percent Given Part and Whole

Front

What is the formula to find the percentage of a part compared to a whole?

Back

Percentage = (Part / Whole) × 100

Front

If Sally got 22 questions wrong on a quiz of 40 questions, how do you calculate the percentage of questions she got wrong?

Back

Percentage wrong = (22 / 40) × 100 = 55%.

Front

In a class of 30 kids, how do you find the percentage of kids who forgot to get their report cards signed?

Back

Percentage = (3 / 30) × 100 = 10%.

Front

How do you calculate the percentage of girls in a class of 25 students where 15 are boys?

Back

Percentage of girls = (10 / 25) × 100 = 40%.

Front

What percentage of employees are students in a pizza shop with 25 employees, 14 of whom are students?

Back

Percentage of students = (14 / 25) × 100 = 56%.

Front

If Greg answered 9 out of 12 questions correctly, how do you find the percentage of questions he got right?

Back

Percentage correct = (9 / 12) × 100 = 75%.

Front

What does 'percent' mean?

Back

Percent means 'per hundred' and is a way to express a number as a fraction of 100.

Front

How can you express 25% as a fraction?

Back

25% = 25/100 = 1/4.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying by 100.

Front

If a student scores 80% on a test with 50 questions, how many questions did they answer correctly?

Back

Correct answers = 80% of 50 = 0.80 × 50 = 40 questions.