Understanding Fractions and Ratios

The video tutorial explains how to calculate the total time Doris needs to complete her work at the bank. Doris has completed one-sixth of her job in 2.25 hours. The tutorial sets up a ratio to determine the time required for the remaining five-sixths of the job. By converting time into fractions and using cross-multiplication, the tutorial finds that Doris will need 11.25 hours to finish the entire job.

What fraction of her work has Doris completed at the bank?

• One-sixth

• One-third

• One-half

• Two-thirds

How much of the work is left for Doris to complete?

• One-third

• Five-sixths

• Two-thirds

• One-sixth

How many minutes are in 0.25 hours?

• 15 minutes

• 25 minutes

• 10 minutes

• 20 minutes

What is the total time Doris took to complete one-sixth of her work?

• 2 hours and 30 minutes

• 2 hours

• 2 hours and 15 minutes

• 3 hours

What is the equivalent of 2.25 hours in terms of hours and minutes?

• 2 hours and 10 minutes

• 2 hours and 15 minutes

• 2 hours and 20 minutes

• 2 hours and 30 minutes

What is the purpose of setting up a ratio in this problem?

• To calculate the remaining time needed

• To determine the rate of work

• To find the total work completed

• To compare the time taken for different tasks

What is the purpose of converting 2.25 hours into a fraction?

• To simplify the calculation

• To make it a whole number

• To compare with other fractions

• To convert it into minutes

What is the first step in setting up the ratio?

• Multiply the fractions

• Subtract the fractions

• Add the fractions

• Identify the smaller fraction

What mathematical operation is used to solve the ratio?

• Division

• Cross-multiplication

• Subtraction

• Addition

What is the result of multiplying 6 by 45?

• 300

• 270

• 180

• 240