Problem
()) Marco set aside 50 minutes before dinner to work on his homework. He spent 22 minutes on math. Marco's grandmother wants to know what percent of his study time he spent on math. (4)) Which statement describes the amount of time Marco spent on his math homework? (1) Marco spent most of his study time on math. (1)) Marco spent about half of his study time on math. ()) Marco spent less than one-quarter of his study time on math.
Solution
Step 1 ：\textrm{Step 1: Calculate the fraction of time spent on math.}\newline \textrm{Math Fraction} = \frac{\textrm{Minutes on math}}{\textrm{Total Minutes}} = \frac{22}{50}
Step 2 ：\textrm{Step 2: Convert the fraction to a percentage.}\newline \textrm{Percentage} = \frac{22}{50} \times 100 \%= 44\%
Step 3 ：\textrm{Step 3: Choose the statement based on percentage.}\newline \textrm{Since 44% is close to 50%, Marco spent about half of his study time on math.}
