What is 21/40 Simplified to Simplest Form?

Fraction Simplifier Calculator

What is 21/40 Simplified?

Answer: Fraction 21/40 simplified to lowest terms is 21/40

21

/

40

=

21

/

40

The fraction 21/40 is already in the simplest form, so it isn't possible to reduce it any further - numerator 21 and denominator 40 have no common factors other than 1 (one)

Simplifying Fraction 21/40 using GCF

The first way to simplify the fraction 21/40 is to use the Greatest Common Factor (GCF) of our numerator [21] and denominator [40].

GCF of 21 and 40 is 1

And then divide both the numerator [21] and denominator [40] by the GCF [1].

21 ÷ 1

/

40 ÷ 1

=

21

/

40

Simplifying Fraction 21/40 using Prime Factors

Another method to reduce the fraction 21/40 to its simplest form is to use the Prime Factors of numerator [21] and denominator [40].

Prime Factors of 21: 3,7

Prime Factors of 40: 2,2,2,5

Now we can write down a new fraction expressed by its Prime Factors and cancel common factors in numerator and denominator:

3 × 7

/

2 × 2 × 2 × 5

=

21

/

40

Simplifying Fraction 21/40 by Dividing by the Smallest Possible Number

In order to simplify our fraction we can start dividing both the numerator [21] and denominator [40] by the smallest possible number (2,3,4,5... and so on), and repeat this until it is impossible to divide without a reminder.

In our case (21/40) there is no possible numbers to divide our numerator and denominator.

Related Calculations

Fraction Simplification Table

Fraction	Lowest Terms
21/25	21/25
21/26	21/26
21/27	7/9
21/28	3/4 (¾)
21/29	21/29
21/30	7/10
21/31	21/31
21/32	21/32
21/33	7/11
21/34	21/34
21/35	3/5 (⅗)
21/36	7/12
21/37	21/37
21/38	21/38
21/39	7/13
21/40	21/40
21/41	21/41
21/42	1/2 (½)
21/43	21/43
21/44	21/44
21/45	7/15
21/46	21/46
21/47	21/47
21/48	7/16
21/49	3/7
21/50	21/50
21/51	7/17
21/52	21/52
21/53	21/53
21/54	7/18

Fraction Simplifier Calculator

This calculator will help you to simplify any fraction to its simplest form. For example, it can help you find out what is 21/40 Simplified? (The answer is: 21/40). Enter the fraction (numerator and denominator) (e.g. '21/40') and hit the 'Simplify' button.

Simplifying a fraction, (e.g. 21/40) means reducing it to its simplest form. A fraction is considered simplified if its numerator and denominator have no common factors other than 1 (one).

21/40 Simplified