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Ratios are a comparison. They may be written as afraction, with colons, or using the word to. See examples below. 3/4 3:4 3 to 4. Ratios need to be simplified. Rates are ratios thatcompare unlike units like dollars per hour or milesper gallon. Simplify. 18 boys 12 boys divide by 6 divide by 6 12 white roses Simplify. 30 roses Simplify. 9 hours 3 people Simplify. 3 gallons 45 miles Find the unit rate. (How much for one.) 3 hours $60 $ 1 hour Find the unit rate. (How much for one.) 3 flowers $7.50 $ 1 flower Find the unit rate. (How much for one.) 10 hours $80 $ 1 hour Find the unit rate. (How much for one.) 3 gallons 45 miles 1 gallon gallon Solve the following proportions. 8 songs 1 cd x by 6 x by 6 6 cd's songs Solve the following proportions. 3 tickets Cross multiply $60 x 5 then divide by 3. $60 $ 5 tickets Solve the following proportions. 2 hours $60 $150 hours Solve the following proportions. 2.5 8 15 A 4 liter bottle of laundry detergent costs $7.99. A 6.5 liter bottle of laundry detergent costs $16.99. Which one is the better buy? To compare find out how much one liter of each costs. 4 liters fpr $7.99 6.5 liters for $16.99 A 2.2 lb. package of chicken costs $5.99. A 5.1 lb. package of chicken costs $9.95. Which one is the better buy? To compare find out how much does one pound of each cost. 2.2 lb. for $5.99 5.1 lb. of $9.95 Aryana made 12 pairs of earrings in 2 hours. How many pairs of earrings could she make in 3 hours? How many pairs of earrings can she make in 3 hours? How many pairs of earrings can she make in one hour? pairs pairs |