What is gcd 15,30,45 ?

The solution to gcd 15,30,45 is 15

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Find the GCF 15 , 30 , 45

gcf

15, 30, 45

15

Solution steps

15, 30, 45

Prime factorization of

15 : 3 \cdot 5

15

15

divides by

315 = 5 \cdot 3

= 3 \cdot 5

3, 5

are all prime numbers, therefore no further factorization is possible

= 3 \cdot 5

Prime factorization of

30 : 2 \cdot 3 \cdot 5

30

30

divides by

230 = 15 \cdot 2

= 2 \cdot 15

15

divides by

315 = 5 \cdot 3

= 2 \cdot 3 \cdot 5

2, 3, 5

are all prime numbers, therefore no further factorization is possible

= 2 \cdot 3 \cdot 5

Prime factorization of

45 : 3 \cdot 3 \cdot 5

45

45

divides by

345 = 15 \cdot 3

= 3 \cdot 15

15

divides by

315 = 5 \cdot 3

= 3 \cdot 3 \cdot 5

3, 5

are all prime numbers, therefore no further factorization is possible

= 3 \cdot 3 \cdot 5

The prime factors common to

15, 30, 45

are

= 3 \cdot 5

Multiply the numbers:

3 \cdot 5 = 15

= 15

\frac{43}{50}

2 \frac{1}{2}

t h e \frac{45}{360}

t o a p erce n t a g e 30/50

\frac{4}{3}