3/14 and 4/15 least common denominator

Question

i need to know quick.

Answer 1

Given fractions are 3/14 and 4/15.

Multiples of  14 is 14,28,42,56,70,84,98,112,126,140,154,168,182,196,210,...

Multiples of 15 is 15,30,45,60,75,90,105,120,135,150,165,180,195,210,...

Least common denominator is 210.

Another way to find the least common denominator of 14 and 15, just multiply both the numbers.

14*15 = 210

Answer 2

Write the prime factorization of each denominator.

14 = 2 * 7= 2¹ * 7¹

15 = 3 * 5 = 3¹ * 5¹

Multiply highest power of each factor in the either number.

L.C.D =2¹ * 3¹ * 7¹ * 5¹

           = 210