This document provides a review for the MAT 045 final exam. It contains 22 practice problems covering ratios, unit rates, proportions, percent decrease, conversions between units, perimeter, area, and scale drawings. The problems get progressively more complex, starting with writing ratios as fractions and finding unit rates, and building up to multi-step word problems involving scale drawings, sales amounts, and perimeter and area calculations for geometric shapes.

1. MAT 045 FINAL EXAM REVIEW - PART II
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Write the ratio as a fraction in lowest terms.
1) 1)20 to 22
2) 2)104 miles to 128 miles
Find the unit rate.
3) 3)300 miles on 15 gallons of gas
4) 4)$4200 earned in 5 weeks
Find the best buy (based on cost per unit).
5) 5)Brand X: 15 oz for $3.75
Brand Y: 10 oz for $2.40
6) 6)Brand A: 30 oz for $21.90
Brand B: 24 oz for $16.80
Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
7)
2
x
=
4
6
7)
8)
1
2
=
x
9
8)
1

2. Solve the problem.
9) 9)On a map, the length of a nature-center trail is 8.4 centimeters. If the scale is 3 centimeters
to 19 kilometers, what is the actual length of the trail?
10) 10)A hardware store had monthly sales of $94,800 and spent 4% of it on legal fees. How much
was spent on legal fees?
11) 11)By switching service providers, a family's telephone bill decreased from about $50 a month
to about $43. What was the percent of decrease?
Convert the units.
12) 12)36 in. = ft (12 in. = 1 ft.)
13) 13)75 ft = yd (1 yard = 3 feet )
14) 14)22 c = pt (1 pint = 2 cups )
15) 15)2 c = fl oz (1 cup = 8 fl oz )
16) 16)9.10 m = cm
17) 17)3.9 L = mL
18) 18)0.83 L = mL
2

3. Find the perimeter.
19) 19)
8 ft 4 ft
9 ft
Find the area.
20) 20)
30 yd
34 yd
24 yd
Find the perimeter and area of the figure.
21) 21)1.71 feet perimeter = _______________
4.4 feet 4.4 feet
1.71 feet area = _______________
3