Least Common Multiple (LCM) of 30 and 80
The least common multiple (LCM) of 30 and 80 is 240.
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 30 and 80?
First, calculate the GCD of 30 and 80 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 30 ÷ 80 = 0 remainder 30 |
| 2 | 80 ÷ 30 = 2 remainder 20 |
| 3 | 30 ÷ 20 = 1 remainder 10 |
| 4 | 20 ÷ 10 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 149 and 92 | 13708 |
| 180 and 160 | 1440 |
| 170 and 155 | 5270 |
| 120 and 145 | 3480 |
| 33 and 153 | 1683 |