For example,

They both do have the same denominator, so we can multiply them.
We need to multiply the numerators.
Next, multiply the denominators.
We then get:
1/4
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If the denominators are not the same, find the LCD (Least Common Denominator) of the two fractions. Then, follow above.
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Need Help? Please leave a comment :D
Answer:
$16.80
Step-by-step explanation:
20 % of 20 is 4 and you would take the 4 off for a discount. 5% of 16 is 0.8 and you would add it since it's an additional tax.
Answer:
Far left one, A
Step-by-step explanation:
13)
Circumference (C) = 2π·r
11π = 2π·r
11/2 = r
******************************
Area (A) = π·r²
= π·(11/2)²
= 121π/4
≈ 94.985 in²
14)
diameter = 2r
42 = 2r
21 = r
*******************
Area (A) = π·r²
= π·(21)²
= 441π
≈ 1384.74 in²
***************************
$280/1384.74 in²
x = $0.20
Answer: about 20 cents per square inch