Robbins 8th grade Math Review day 2

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

Front

How do you calculate the percentage of a part compared to a whole?

Back

To calculate the percentage, divide the part by the whole and then multiply by 100. Formula: (Part/Whole) x 100.

Front

What does it mean to round to the nearest whole number?

Back

Rounding to the nearest whole number means adjusting a decimal number to the closest integer. If the decimal is .5 or higher, round up; if it's less than .5, round down.

Front

If 73% of students ordered 2 slices of pizza, how many students ordered 2 slices if there are 200 students?

Back

To find the number of students, multiply 200 by 0.73 (73%). So, 200 x 0.73 = 146 students.

Front

What is the formula for finding the total number of students from a percentage?

Back

Total Students = (Number of Students who ordered slices / Percentage) x 100.

Front

What is a fraction?

Back

A fraction represents a part of a whole and is expressed as a numerator (top number) over a denominator (bottom number).

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100.

Front

What is the relationship between fractions, decimals, and percentages?

Back

Fractions, decimals, and percentages are different ways to represent the same value. They can be converted from one form to another.

Front

What does it mean to express a number as a percentage?

Back

Expressing a number as a percentage means showing it as a part of 100, which helps in comparing different quantities.

Front

What is the significance of rounding in calculations?

Back

Rounding simplifies numbers, making them easier to work with, but it can also lead to slight inaccuracies.