I need help doing this question

Question

Last night Vivian spent 90 minutes doing Homework,2/3 of an Hour reading ,and 480 seconds making her lunch for the next day .How many more minutes did Vivian spend doing homework than she did reading and making lunch

Answer 1

Homework = 90 minutes

Reading = 40 minutes (An hour equals 60 minutes and if you divide 60 by 3, you get 20. The reason I divided 60 by 3 is because it mentions that Vivian spent 2/3 hour reading. One-third of 60 is 20, and you can multiply 20 by 2 to get 2/3 of 60.)

Making lunch = 8 minutes (One minutes equals 60 seconds so divide 480 seconds by 60 seconds to figure out how many minutes that is.)

Add the minutes she spent doing homework plus the minutes she spent making lunch to get 48. How many more means to subtract so subtract 48 from 90 to get your final answer.