#### Answer

LCD is 150.

#### Work Step by Step

To find the least common denominator factor each denominator then multiply each factor the greatest number of times it occurs in either number.
$25=\underline5\times\underline5$
$15=\underline3\times5$
$6=\underline2\times3$
$LCD=5\times5\times3\times2=25\times6=150$