What Is 21/42 as a Decimal + Solution With Free Steps
The fraction 21/42 as a decimal is equal to 0.5.
Decimal notation can be obtained from fractional representation by applying the division method to it. After applying the division method, we will get a quotient and a remainder. The fraction 21/42 is a proper fraction.
Here, we are more interested in the division types that result in a Decimal value, as this can be expressed as a Fraction. We see fractions as a way of showing two numbers having the operation of Division between them that result in a value that lies between two Integers.
Now, we introduce the method used to solve said fraction to decimal conversion, called Long Division, which we will discuss in detail moving forward. So, let’s go through the Solution of fraction 21/42.
First, we convert the fraction components, i.e., the numerator and the denominator, and transform them into the division constituents, i.e., the Dividend and the Divisor, respectively.
This can be done as follows:
Dividend = 21
Divisor = 42
Now, we introduce the most important quantity in our division process: the Quotient. The value represents the Solution to our division and can be expressed as having the following relationship with the Division constituents:
Quotient = Dividend $\div$ Divisor = 21 $\div$ 42
This is when we go through the Long Division solution to our problem. The following figure shows the solution for fraction 21/42.
21/42 Long Division Method
We start solving a problem using the Long Division Method by first taking apart the division’s components and comparing them. As we have 21 and 42, we can see how 21 is Smaller than 42, and to solve this division, we require that 21 be Bigger than 42.
This is done by multiplying the dividend by 10 and checking whether it is bigger than the divisor or not. If so, we calculate the Multiple of the divisor closest to the dividend and subtract it from the Dividend. This produces the Remainder, which we then use as the dividend later.
Now, we begin solving for our dividend 21, which after getting multiplied by 10 becomes 210.
We take this 210 and divide it by 42; this can be done as follows:
210 $\div$ 42 = 5
42 x 5 = 210
Finally, we have a Quotient generated after combining the one piece of it as 0.5, with a Remainder equal to 0.
Images/mathematical drawings are created with GeoGebra.