What is 20.8 as a Fraction?

Learn how to convert 20.8 to a fraction with step-by-step instructions

Quick Answer

20.8 as a fraction is:

104/5

This is the simplest form of the fraction

20.8 Decimal to Fraction Calculator

Convert Any Decimal to a Fraction

Enter a decimal number to see its fraction equivalent

How to Convert 20.8 to a Fraction

General Method: Converting Decimals to Fractions

Follow these steps to convert any decimal to a fraction

Step 1: Count Decimal Places

Count the number of digits after the decimal point

Example: 0.25 has 2 decimal places

Step 2: Multiply by Power of 10

Multiply by 10 raised to the number of decimal places

0.25 × 100 = 25

Step 3: Create Fraction

Use the result as numerator over the multiplier as denominator

25/100

Step 4: Simplify

Reduce the fraction if possible by dividing both numbers by their GCD

25/100 = 1/4

Converting 20.8 to a Fraction

Let's apply the method to convert 20.8

1

Count the decimal places in 20.8

20.8
There is 1 digit after the decimal point
2

Multiply by 10 (10)

20.8 × 10 = 208
Moving the decimal point 1 place right
3

Write as a fraction

208/10
Numerator: 208, Denominator: 10
4

Simplify the fraction

208/10 = 104/5
Divide both numbers by their greatest common factor (2)

Final Result

20.8 = 104/5

Tips and Notes

  • The denominator will always be a power of 10 for terminating decimals
  • Each decimal place corresponds to multiplying by 10 (e.g., 1 places = 10)
  • Very small decimals like 20.8 often result in fractions with large denominators
DecimalFractionComparison
2.0810.4/5Smaller
20.8104/5Current Value
2081040/5Larger
208010400/5Larger
20800104000/5Larger

Additional Information

Scientific Notation

20.8 can be written as 104 × 10⁻1 in scientific notation

Percentage

20.8 is equal to 2080.000% as a percentage

Common Calculations with 20.8

Quick Reference Guide

Common calculations and conversions with 20.8

Multiplication

  • 20.8 × 10 = 208
  • 20.8 × 100 = 2080
  • 20.8 × 1000 = 20800
  • 20.8 × 10000 = 208000
  • 20.8 × 5 = 104

Division

  • 20.8 ÷ 2 = 10.4
  • 20.8 ÷ 5 = 4.16
  • 20.8 ÷ 10 = 2.08
  • 20.8 ÷ 1/20.8 = 5

20.8 in Different Number Systems

Decimal

20.8

Scientific Notation

104 × 10⁻1

Percentage

2080.000%

Fraction

104/5

Parts Per Million

20800000 PPM

Binary

0.1000

Real-World Applications of 20.8

Where You Might Encounter 20.8

Scientific Applications

  • • Microscopic measurements (20800000 micrometers)
  • • Chemical concentrations
  • • Statistical probability calculations
  • • Error margins in precise measurements

Engineering

  • • Manufacturing tolerances
  • • Electronic component specifications
  • • Quality control measurements
  • • Precision engineering