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What is 1.25 as a Fraction?

Learn how to convert 1.25 to a fraction with step-by-step instructions

Quick Answer

1.25 as a fraction is:

5/4

This is the simplest form of the fraction

1.25 Decimal to Fraction Calculator

Convert Any Decimal to a Fraction

Enter a decimal number to see its fraction equivalent

How to Convert 1.25 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 1.25 to a Fraction

Let's apply the method to convert 1.25

1

Count the decimal places in 1.25

1.25
There are 2 digits after the decimal point
2

Multiply by 10⁵ (100)

1.25 × 100 = 125
Moving the decimal point 2 places right
3

Write as a fraction

125/100
Numerator: 125, Denominator: 100
4

Simplify the fraction

125/100 = 5/4
Divide both numbers by their greatest common factor (25)

Final Result

1.25 = 5/4

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., 2 places = 100)
  • Very small decimals like 1.25 often result in fractions with large denominators

Related Decimal to Fraction Conversions

DecimalFractionComparison
0.1250.5/4Smaller
1.255/4Current Value
12.550/4Larger
125500/4Larger
12505000/4Larger

Additional Information

Scientific Notation

1.25 can be written as 5 × 10⁻2 in scientific notation

Percentage

1.25 is equal to 125.000% as a percentage

Common Calculations with 1.25

Quick Reference Guide

Common calculations and conversions with 1.25

Multiplication

  • 1.25 × 10 = 12.5
  • 1.25 × 100 = 125
  • 1.25 × 1000 = 1250
  • 1.25 × 10000 = 12500
  • 1.25 × 4 = 5

Division

  • 1.25 ÷ 2 = 0.625
  • 1.25 ÷ 5 = 0.25
  • 1.25 ÷ 10 = 0.125
  • 1.25 ÷ 1/1.25 = 4

1.25 in Different Number Systems

Decimal

1.25

Scientific Notation

5 × 10⁻2

Percentage

125.000%

Fraction

5/4

Parts Per Million

1250000 PPM

Binary

0.0010 0101

Real-World Applications of 1.25

Where You Might Encounter 1.25

Scientific Applications

  • • Microscopic measurements (1250000 micrometers)
  • • Chemical concentrations
  • • Statistical probability calculations
  • • Error margins in precise measurements

Engineering

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

Related Decimal Conversions