Enter any decimal value into the Ratio from Decimal Calculator. The calculator will evaluate and display the Ratio from Decimal. 

Decimal to Ratio Calculator

Enter either Decimal Value or Ratio to calculate the other

Ratio from Decimal Formula

The following formula is used to calculate the Ratio from Decimal. 

D=\frac{a}{b}\ \Rightarrow\ R=a:b
  • Where D is the decimal value
  • a is the numerator when D is written as a simplified fraction a/b
  • b is the denominator when D is written as a simplified fraction a/b
  • R is the corresponding ratio written as a:b (unitless)

How to Calculate Ratio from Decimal?

The following example problems outline how to calculate Ratio from Decimal.

Example Problem #1:

  1. First, determine the decimal value, D.
    • The decimal value is given as: 0.75.
  2. Finally, convert D to a simplified fraction a/b and write the ratio as a:b.

D = a/b → R = a:b

The values given above are inserted into the process below and the solution is calculated:

D = 0.75 = 75/100 = 3/4, so R = 3:4


Example Problem #2: 

For this problem, the variables required are provided below:

Decimal value, D = 0.80

Test your knowledge using the equation and check your answer with the calculator above.

R = a:b = ?