One way to find the least common multiple of two numbers is to first list the prime factors of each number. Then multiply each factor the greatest number of times it occurs in either number. If the same factor occurs more than once in both numbers, you multiply the factor the greatest number of times it occurs.
The median is the central number of the data. Align numerically (2, 2, 4, 4) and find the center number. Since there are two, find the average of 2 and 4 to get 3. ([2+4]/2=3)
20%=0.2 14*0.2 = 2.8 ( $2.80 is the tip she will be giving her) $14+$2.80 = $16.80 ( what she will be giving in total) $20-$16.80 = $3.20 (the change she will get back)
