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7.1.1-1.3
Ratios and Rates Quiz Review
Term | Definition |
---|---|
ratio | A comparison of two quantities by division using to, :, /. |
Unit Rate | a rate that has a denominator of 1, found by dividing ex. 110 miles in 2 hours= 110/2= 55 miles per hour |
How to calculate best buy | divide price by number of both items and compare to see which unit rate is lower |
mixed number | a number made up of a whole number and a fraction ex. 1 1/4 |
improper fraction | a fraction whose numerator is larger than the denominator ex. 9/5 |
How to change a mixed number into an improper fraction | multiply the whole number by the denominator and add the numerator, keep the denominator ex. 4 1/3 = 4x3+1/3= 13/3 |
complex fraction | A fraction that contains one or more fractions in its numerator or denominator. ex. 1/4 / 5/6 |
reciprocal fraction | when the denominator and numerator are flipped ex. 2/3 and 3/2 |
divide fractions | multiply by the reciprocal or KCF (keep, change, flip) simplify if needed ex. 2/3 / 4/5 = 2/3 x 5/4 = 10/12 = 5/6 |
Divide Mixed Numbers | change into improper fractions, then multiply by the reciprocal (KCF) ex. 8 1/3 / 2 1/2 = 25/3 / 5/2 = 25/3 x 2/5 = 50/15 = 10/3 = 3 1/3 |
multiply fractions | multiply the numerators and multiply the denominators, simplify if needed ex. 2/3 x 5/4 = 10/12 = 5/6 |