What is 42.55 as a Fraction?

Learn how to convert 42.55 to a fraction with step-by-step instructions

Quick Answer

42.55 as a fraction is:

851/20

This is the simplest form of the fraction

42.55 Decimal to Fraction Calculator

Convert Any Decimal to a Fraction

Enter a decimal number to see its fraction equivalent

How to Convert 42.55 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 42.55 to a Fraction

Let's apply the method to convert 42.55

1

Count the decimal places in 42.55

42.55
There are 2 digits after the decimal point
2

Multiply by 10 (100)

42.55 × 100 = 4255
Moving the decimal point 2 places right
3

Write as a fraction

4255/100
Numerator: 4255, Denominator: 100
4

Simplify the fraction

4255/100 = 851/20
Divide both numbers by their greatest common factor (5)

Final Result

42.55 = 851/20

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 42.55 often result in fractions with large denominators
DecimalFractionComparison
4.25585.1/20Smaller
42.55851/20Current Value
425.58510/20Larger
425585100/20Larger
42550851000/20Larger

Additional Information

Scientific Notation

42.55 can be written as 851 × 10⁻2 in scientific notation

Percentage

42.55 is equal to 4255.000% as a percentage

Common Calculations with 42.55

Quick Reference Guide

Common calculations and conversions with 42.55

Multiplication

  • 42.55 × 10 = 425.5
  • 42.55 × 100 = 4255
  • 42.55 × 1000 = 42550
  • 42.55 × 10000 = 425500
  • 42.55 × 20 = 851

Division

  • 42.55 ÷ 2 = 21.275
  • 42.55 ÷ 5 = 8.51
  • 42.55 ÷ 10 = 4.255
  • 42.55 ÷ 1/42.55 = 20

42.55 in Different Number Systems

Decimal

42.55

Scientific Notation

851 × 10⁻2

Percentage

4255.000%

Fraction

851/20

Parts Per Million

42550000 PPM

Binary

0.0101 0101

Real-World Applications of 42.55

Where You Might Encounter 42.55

Scientific Applications

  • • Microscopic measurements (42550000 micrometers)
  • • Chemical concentrations
  • • Statistical probability calculations
  • • Error margins in precise measurements

Engineering

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