What is 1 2/5 times 15?

"Multiplying Fractions Calculator" Calculator

Multiply

×

What is 1 2/5 times 15?

Answer

1 2/5 times 15 is 21
1
2
5
×
15
= 21

21 is the result of multiplying 1 2/5 by 15.

Steps to multiply 1 2/5 by 15

Multiplying fractions means taking a part of a part, so 1 2/5 × 15 is solved by multiplying the numerators together and the denominators together. Here is every step.

Step 1: Write both numbers as fractions

A whole number is written over 1, and a mixed number becomes an improper fraction: multiply the whole part by the denominator and add the numerator.

1 2/5 = (1 × 5 + 2)/5 = 7/5

15 = 15/1

Step 2: Multiply across

Multiply the numerators together and the denominators together. No common denominator is needed — that is only for addition and subtraction.

7/5 × 15/1

=

(7 × 15)/(5 × 1)

=

105/5

Step 3: Reduce the fraction

The greatest common factor of 105 and 5 is 5, so divide both parts by it.

105/5

=

21

Answer

1 2/5 × 15

=

21

See Also

About "Multiplying Fractions Calculator" Calculator

This calculator multiplies two fractions and shows the whole solution, not just the answer. Mixed numbers and whole numbers are accepted on both sides, so you can multiply 2 3/4 by 2/3 just as easily as 1/2 by 4.

For example, it can help you find out what is 1 2/5 times 15? (The answer is: 21).

Enter the first factor on the left and the second one on the right (for example '1 2/5' and '15'), then press the button.

The result is given as a fraction in its lowest terms, as a mixed number when it is greater than one, and as a decimal — with an approximation sign whenever the decimal never ends.

Every page also shows why the method works: multiplying fractions means taking a part of a part, so the numerators multiply together and the denominators multiply together.

"Multiplying Fractions Calculator" Calculator

Multiply

×

Fraction Multiplication Table

MultiplicationResultDecimal Form
1 2/5 × 321/5= 4.2
1 2/5 × 3 1/314/3≈ 4.6667
1 2/5 × 3 1/249/10= 4.9
1 2/5 × 3 2/377/15≈ 5.1333
1 2/5 × 428/5= 5.6
1 2/5 × 4 3/5161/25= 6.44
1 2/5 × 4 3/4133/20= 6.65
1 2/5 × 57= 7
1 2/5 × 642/5= 8.4
1 2/5 × 749/5= 9.8
1 2/5 × 856/5= 11.2
1 2/5 × 963/5= 12.6
1 2/5 × 1014= 14
1 2/5 × 1177/5= 15.4
1 2/5 × 1284/5= 16.8
1 2/5 × 1521= 21
1 2/5 × 16112/5= 22.4
1 2/5 × 18126/5= 25.2
1 2/5 × 21147/5= 29.4
1 2/5 × 3042= 42

FAQ

What is 1 2/5 times 15?

1 2/5 times 15 is 21

How do you multiply 1 2/5 by 15?

Write both numbers as improper fractions: 7/5 and 15/1. Multiply straight across: 7/5 × 15/1 = 105/5. Both parts share a factor of 5, so 105/5 reduces to 21.

What is 1 2/5 times 15 as a decimal?

1 2/5 × 15 = 21. The product comes out whole, so there is nothing after the decimal point.

Why does 105/5 become 21?

The numerator and the denominator of 105/5 share a greatest common factor of 5. Dividing both by 5 leaves 21, the same value in its lowest terms.