LCM for 3 and 15

The first method to find LCM for numbers 3 and 15 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 3 and 15 is 3, so

LCM = (3 × 15) ÷ 3

LCM = 45 ÷ 3

LCM = 15

The second method to find LCM for numbers 3 and 15 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 3: 3, 6, 9, 12, 15, 18, 21

Multiples of 15: 15, 30, 45, 60, 75, 90, 105, [...], 15

So the LCM for 3 and 15 is 15

Another method to find LCM for numbers 3 and 15 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

• What is the GCF of 3 and 15
• 3/15 as a decimal
• What is 3/15 as a percent?
• What is 3 percent of 15?