What is the difference between lcm and lcd? ?

The lowest common denominator, or LCD, denotes the smallest number divisible by the denominators of every fraction in a set, whereas a least common multiple, orLCM, is the smallest multiple that two numbers have in common as products. Finding the LCD and LCMrequires knowing prime factors of a number.

Ithink you're supposed to multiply 12.50 which is how much he makes per hour and then multiply it by each number then add whats left togrther and there's your answer