Least Common Multiple (LCM) of 45 and 80
The least common multiple (LCM) of 45 and 80 is 720.
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 45 and 80?
First, calculate the GCD of 45 and 80 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 45 ÷ 80 = 0 remainder 45 |
| 2 | 80 ÷ 45 = 1 remainder 35 |
| 3 | 45 ÷ 35 = 1 remainder 10 |
| 4 | 35 ÷ 10 = 3 remainder 5 |
| 5 | 10 ÷ 5 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 191 and 15 | 2865 |
| 195 and 129 | 8385 |
| 97 and 143 | 13871 |
| 43 and 127 | 5461 |
| 110 and 89 | 9790 |