AI generatedRatio, proportion and rates of changeKS3 / GCSE

Converting between hours and decimal hours

Converting between hours and decimal hours.

  • Write the conversion fact before choosing whether to multiply or divide.
  • Area units use the square of a length conversion; volume units use its cube.
  • Time is based on 60, not 100. Keep the requested unit in your answer.

Example 1

Write 1 hours 0 minutes as decimal hours, to 2 d..

HoursDivide minutes by 60, not by 100.
HoursRound the final decimal to 2 d..

Example 2

Convert 1.08 hours to hours and minutes, to the nearest minute.

Fractional hourSeparate the whole hours.
MinutesMultiply the fractional hour by 60.
1 hours 5 minutes.

Your turn

Question 1

Write 1 hours 10 minutes as decimal hours, to 2 d..

Check answer
HoursDivide minutes by 60, not by 100.
HoursRound the final decimal to 2 d..
Question 2

Convert 1.25 hours to hours and minutes, to the nearest minute.

Check answer
Fractional hourSeparate the whole hours.
MinutesMultiply the fractional hour by 60.
1 hours 15 minutes.
Question 3

Write 1 hours 20 minutes as decimal hours, to 2 d..

Check answer
HoursDivide minutes by 60, not by 100.
HoursRound the final decimal to 2 d..
Question 4

Convert 1.42 hours to hours and minutes, to the nearest minute.

Check answer
Fractional hourSeparate the whole hours.
MinutesMultiply the fractional hour by 60.
1 hours 25 minutes.
Question 5

Write 1 hours 30 minutes as decimal hours, to 2 d..

Check answer
HoursDivide minutes by 60, not by 100.
HoursRound the final decimal to 2 d..
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