Algebra 1
posted by Dani. .
What is 2/7  1/4 + 9/14? What is the LCD? And how did you find it?

2/7  1/4 + 9/14
One way to find the LCD is to find the multiples of the largest denominator. It must be also divisible by the other denominators.
14, 28, 42
Ah  28 is also divisible by 7 and 2.
The LCD is 28.