What is the Least Common Multiple of 225 and 240?
Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.
Least common multiple (LCM) of 225 and 240 is 3600.
LCM(225,240) = 3600
Least Common Multiple of 225 and 240 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 225 and 240, than apply into the LCM equation.
GCF(225,240) = 15
LCM(225,240) = ( 225 × 240) / 15
LCM(225,240) = 54000 / 15
LCM(225,240) = 3600
Least Common Multiple (LCM) of 225 and 240 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 225 and 240. First we will calculate the prime factors of 225 and 240.
Prime Factorization of 225
Prime factors of 225 are 3, 5. Prime factorization of 225 in exponential form is:
225 = 32 × 52
Prime Factorization of 240
Prime factors of 240 are 2, 3, 5. Prime factorization of 240 in exponential form is:
240 = 24 × 31 × 51
Now multiplying the highest exponent prime factors to calculate the LCM of 225 and 240.
LCM(225,240) = 32 × 52 × 24
LCM(225,240) = 3600
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