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Last updated on March 13th, 2025
It is a simple question on decimal conversion. Firstly, we have to learn fractions and decimals. A fraction represents a part of the whole. It has two parts, 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 28. A decimal is a way to represent a number that is not whole, using a (.) or a decimal point to separate the whole part from the fraction part. The numbers to the left of the decimal point represent the whole, and those to the right represent the fractional part.
21/28 in decimals can be written as approximately 0.75. It is a terminating decimal, meaning it does not repeat infinitely.
To convert 21/28 to a decimal, we will use the division method. Here, since 21 is smaller than 28, we will perform the division directly, which will give us an approximate value of 0.75. 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 (28) will be taken as the divisor.
Step 2: Perform the division of 21 by 28. Since 21 is smaller than 28, the division will result in a value less than 1.
Step 3: Use long division to determine how many times 28 fits into 210 (by multiplying 21 by 10 to facilitate division).
Step 4: Calculate 28 × 7 = 196, which is the closest multiple of 28 to 210 without exceeding it.
Step 5: Subtract 196 from 210 to get 14, then bring down another 0 to make it 140, and repeat the division process.
Step 6: Continue the division process until the remainder is 0, confirming that 21/28 is a terminating decimal.
The answer for 21/28 as a decimal will be approximately 0.75.