Least Common Multiple (LCM) of 47 and 87
The least common multiple (LCM) of 47 and 87 is 4089.
What is the Least Common Multiple (LCM)?
The LCM of two integers is the smallest positive integer that is divisible by both numbers. It is often used to find common denominators and solve problems involving periodic events.
Formula for LCM
The LCM of two numbers can be calculated using their GCD:
LCM(a, b) = |a × b| ÷ GCD(a, b)
How to Calculate the LCM of 47 and 87?
First, calculate the GCD of 47 and 87 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 47 ÷ 87 = 0 remainder 47 |
| 2 | 87 ÷ 47 = 1 remainder 40 |
| 3 | 47 ÷ 40 = 1 remainder 7 |
| 4 | 40 ÷ 7 = 5 remainder 5 |
| 5 | 7 ÷ 5 = 1 remainder 2 |
| 6 | 5 ÷ 2 = 2 remainder 1 |
| 7 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 68 and 131 | 8908 |
| 178 and 191 | 33998 |
| 183 and 126 | 7686 |
| 43 and 55 | 2365 |
| 142 and 63 | 8946 |