$21.60 - $18.00 = $3.60
$3.60 : $18.00 = 0.2
0.2 · 100% = 20%
Answer: 
Step-by-step explanation:
Least Common Multiple :The least positive number that is a multiple of two or more numbers.
To find : The least common multiple of:
and 
Since, 

The least common multiple of:
and
=
[take highest power of x and y ]
Hence, the least common multiple of:
and
= 
Answer: 3p+ 5
Step-by-step explanation:
1 Remove parentheses.
Negative and negative = + below
6 + 3p - 1
2 Collect like terms.
3p + 6 - 1
3 Simplify.
3p + 5
Hope this helps!!! Good luck!!! ;)