Least Common Multiple (LCM) of 78 and 197
The least common multiple (LCM) of 78 and 197 is 15366.
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 78 and 197?
First, calculate the GCD of 78 and 197 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 78 ÷ 197 = 0 remainder 78 |
| 2 | 197 ÷ 78 = 2 remainder 41 |
| 3 | 78 ÷ 41 = 1 remainder 37 |
| 4 | 41 ÷ 37 = 1 remainder 4 |
| 5 | 37 ÷ 4 = 9 remainder 1 |
| 6 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 17 and 118 | 2006 |
| 61 and 87 | 5307 |
| 61 and 15 | 915 |
| 75 and 68 | 5100 |
| 124 and 152 | 4712 |