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( [link] ) Compare 4 cassette tapes to 7 dollars.
$\frac{\text{4 cassette tapes}}{\text{7 dollars}}$
( [link] ) What do we call a comparison, by division, of two unlike denominate numbers?
Rate
For problems 3 and 4, express each ratio or rate as a fraction.
( [link] ) 5 televisions to 2 radios
$\frac{\text{5 televisions}}{\text{2 radios}}$
For problems 5 and 6, write each ratio or rate in the form " $a$ to $b$ ."
( [link] ) $\frac{\text{8 maps}}{\text{3 people}}$
8 maps to 3 people
( [link] ) $\frac{\text{2 psychologists}}{\text{75 people}}$
two psychologists to seventy-five people
For problems 7-9, solve each proportion.
( [link] ) $\frac{\text{3 computers}}{\text{8 students}}=\frac{\text{24}\text{computers}}{x\text{students}}$
64
( [link] ) On a map, 4 inches represents 50 miles. How many miles does 3 inches represent?
$\text{37}\frac{1}{2}$
( [link] ) An acid solution is composed of 6 milliliters of acid to 10 milliliters of water. How many milliliters of acid are there in an acid solution that is composed of 3 milliliters of water?
1.8
( [link] ) The odds that a particular event will occur are 9 to 7. If the event occurs 27 times, how many times would you predict it will it not occur?
21
For problems 13 and 14, convert each decimal to a percent.
( [link] ) $3.\stackrel{\_}{7}$
$\text{377}\frac{7}{9}\text{}$ %
For problems 15 and 16, convert each percent to a decimal.
For problems 17-19, convert each fraction to a percent.
For problems 20 and 21, convert each percent to a fraction.
( [link] ) $\frac{4}{\text{27}}$ %
$\frac{4}{\mathrm{2,}\text{700}}\text{or}\frac{1}{\text{675}}$
For problems 22-25, find each indicated quantity.
( [link] ) 0.1 is 1.1% of what number?
$9\text{.}\overline{\text{09}}$
( [link] ) A salesperson makes a monthly salary of $1,000.00. He also gets a commission of 12% of his total monthly sales. If, in a particular month, he sells $5,500.00 worth of merchandise, what is his income that month?
$1,660
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