What is 42/21 Simplified to Simplest Form?

Simplifying Fraction 42/21 using GCF

The first way to simplify the fraction 42/21 is to use the Greatest Common Factor (GCF) of our numerator [42] and denominator [21].

GCF of 42 and 21 is 21

And then divide both the numerator [42] and denominator [21] by the GCF [21].

42 ÷ 21

/

21 ÷ 21

=

2

/

1

Simplifying Fraction 42/21 using Prime Factors

Another method to reduce the fraction 42/21 to its simplest form is to use the Prime Factors of numerator [42] and denominator [21].

Prime Factors of 42: 2,3,7

Prime Factors of 21: 3,7

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

2 × 3 × 7

/

3 × 7

=

2

/

1

Simplifying Fraction 42/21 by Dividing by the Smallest Possible Number

In order to simplify our fraction we can start dividing both the numerator [42] and denominator [21] by the smallest possible number (2,3,4,5... and so on), and repeat this until it is impossible to divide without a reminder.

42 ÷ 3

/

21 ÷ 3

=

14

/

7

14 ÷ 7

/

7 ÷ 7

=

2

/

1

Fraction Simplification Table

Fraction	Lowest Terms
42/6	7/1
42/7	6/1
42/8	21/4
42/9	14/3
42/10	21/5
42/11	42/11
42/12	7/2
42/13	42/13
42/14	3/1
42/15	14/5
42/16	21/8
42/17	42/17
42/18	7/3
42/19	42/19
42/20	21/10
42/21	2/1
42/22	21/11
42/23	42/23
42/24	7/4
42/25	42/25
42/26	21/13
42/27	14/9
42/28	3/2
42/29	42/29
42/30	7/5
42/31	42/31
42/32	21/16
42/33	14/11
42/34	21/17
42/35	6/5

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 42/21 Simplified? (The answer is: 2/1). Enter the fraction (numerator and denominator) (e.g. '42/21') and hit the 'Simplify' button.

Simplifying a fraction, (e.g. 42/21) 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).

42/21 Simplified