Least Common Multiple (LCM) of 78 and 97
The least common multiple (LCM) of 78 and 97 is 7566.
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 97?
First, calculate the GCD of 78 and 97 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 78 ÷ 97 = 0 remainder 78 |
| 2 | 97 ÷ 78 = 1 remainder 19 |
| 3 | 78 ÷ 19 = 4 remainder 2 |
| 4 | 19 ÷ 2 = 9 remainder 1 |
| 5 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 128 and 83 | 10624 |
| 150 and 121 | 18150 |
| 20 and 118 | 1180 |
| 85 and 48 | 4080 |
| 138 and 180 | 4140 |