What is 18/20 as a percent?

Converting fractions to a percentage can be very helpful. Let's go through the steps to change a decimal into a percentage.

You can try different values to learn more about the conversion process.

Often, convert 17/19 to a percent or 19/21 to a percent, depending on the task.

Determining the scaling factor:

1820=10010= 100 ÷ 10 = 5

Applying a scaling factor to convert fractions to percentages:

18 × 520 × 5=90100 = 0.9 × 100 = 90%


18/20 = 90%

What is a fraction?

A fraction represents parts of a whole. It has a top number (numerator) and a bottom number (denominator). For example, 3/4 means three out of four equal parts.

What is a percent?

A percent represents parts of a hundred. The symbol “%” shows proportions. 50% means half, and 200% means double the original value.

For fractions:

In this guide, we’ll be focusing on the fraction 18/20 and how to convert it into its percentage equivalent.

Method 1 – Fraction Scaling:

  1. Understanding Fractions: At the heart of every fraction, there's a division taking place. The numerator denotes the 'portions' we're focused on. The denominator reveals the total possible 'portions'. So, when we say 1820, we're essentially talking about 18 'portions' out of an available 20.
  2. Explanation of Percentage: The term “Percent” has Latin roots, where “cent” means a hundred. So, a percentage essentially portrays a fraction where the denominator is always 100. For illustration, when we state 50%, it translates to 50 out of 100 or 50100 in fraction terms.
  3. Transformation Process: To convert 1820 into a percentage, we must multiply the fraction to have 100 as its denominator. Begin by determining the factor by which 20 can be multiplied to get 100. This factor is 10020 = 5. Following this logic, multiply both the numerator and denominator by 5:18 × 520 × 5 = 90100.
  4. Final Step: Once multiplied, the fraction denotes 90 out of 100, which is equivalent 90%.

Method 2 – Using Decimals:

  1. Fraction to Decimal Transformation: Begin by expressing 1820 as a decimal. This step requires simple division: divide the numerator (18) by the denominator (20), resulting in 0.9.
  2. Decimal to Percentage Conversion: Now, transform this decimal into a percentage. So, 0.9 multiplied by 100 equals 90%.
  3. Wrapping Up: Through the decimal conversion method as well, 1820 is equivalent of 90% when expressed as a percentage.

Both methods, while distinct in approach, provide the same result. You can choose to use either the direct fraction scaling method or the decimal conversion method.