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Last updated on March 4th, 2025
It is a simple question on decimal conversion. Firstly, we have to learn fractions and decimals. A fraction represents a part from the whole. It has two parts: the numerator (number on the top), here 21, represents how many parts out of the whole. The denominator (number below) shows how many parts make the whole, here it is 5. A decimal is a way to represent a number that is not whole, using a (.) or a decimal to separate the whole part from the fractional part. The numbers to the left of the decimal point represent the whole, and those to the right represent the fractional part.
21/5 in decimals can be written as 4.2. It is a terminating decimal, showing it will not repeat infinitely.
To get 21/5 in decimal, we will use the division method. Here, 21 is larger than 5, so we can divide directly. Let's see the step-by-step breakdown of the process:
Step 1: Identify the numerator and denominator because the numerator (21) will be taken as the dividend and the denominator (5) will be taken as the divisor.
Step 2: Divide 21 by 5. 5 goes into 21 four times, which gives us 20.
Step 3: Subtract 20 from 21, which leaves a remainder of 1.
Step 4: Bring down a 0 to make it 10 and add a decimal point in the quotient place.
Step 5: 5 goes into 10 two times, which gives us 10. Subtract 10 from 10, and the remainder is 0. This process shows that the division ends with no remainder, making it a terminating decimal.
The answer for 21/5 as a decimal will be 4.2.