What is 1.389 as a Fraction?

Learn how to convert 1.389 to a fraction with step-by-step instructions

Quick Answer

1.389 as a fraction is:

1389/1000

This is the simplest form of the fraction

1.389 Decimal to Fraction Calculator

Convert Any Decimal to a Fraction

Enter a decimal number to see its fraction equivalent

How to Convert 1.389 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 1.389 to a Fraction

Let's apply the method to convert 1.389

1

Count the decimal places in 1.389

1.389
There are 3 digits after the decimal point
2

Multiply by 10 (1,000)

1.389 × 1,000 = 1389
Moving the decimal point 3 places right
3

Write as a fraction

1389/1,000
Numerator: 1389, Denominator: 1,000
4

Simplify the fraction

1389/1,000 = 1389/1000
This fraction is already in its simplest form

Final Result

1.389 = 1389/1000

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., 3 places = 1,000)
  • Very small decimals like 1.389 often result in fractions with large denominators
DecimalFractionComparison
0.1389138.9/1000Smaller
1.3891389/1000Current Value
13.8913890/1000Larger
138.9138900/1000Larger
13891389000/1000Larger

Additional Information

Scientific Notation

1.389 can be written as 1389 × 10⁻3 in scientific notation

Percentage

1.389 is equal to 138.900% as a percentage

Common Calculations with 1.389

Quick Reference Guide

Common calculations and conversions with 1.389

Multiplication

  • 1.389 × 10 = 13.89
  • 1.389 × 100 = 138.9
  • 1.389 × 1000 = 1389
  • 1.389 × 10000 = 13890
  • 1.389 × 1000 = 1389

Division

  • 1.389 ÷ 2 = 0.6945
  • 1.389 ÷ 5 = 0.2778
  • 1.389 ÷ 10 = 0.1389
  • 1.389 ÷ 1/1.389 = 1000

1.389 in Different Number Systems

Decimal

1.389

Scientific Notation

1389 × 10⁻3

Percentage

138.900%

Fraction

1389/1000

Parts Per Million

1389000 PPM

Binary

0.0011 1000 1001

Real-World Applications of 1.389

Where You Might Encounter 1.389

Scientific Applications

  • • Microscopic measurements (1389000 micrometers)
  • • Chemical concentrations
  • • Statistical probability calculations
  • • Error margins in precise measurements

Engineering

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