anonymous
  • anonymous
3 1/4 - 1 4/5
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
please help
Hero
  • Hero
3.25 - 1.80 = 1.45 = 1 45/100 = 1 9/20 Sorry, it doesn't actually take that long. I was just playing with other ways to do it.
Hero
  • Hero
This is the easiest way to do it IMO

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anonymous
  • anonymous
ok lol
anonymous
  • anonymous
is that 1(45/100) and 1(9/20)
Hero
  • Hero
Yes they are mixed fractions
anonymous
  • anonymous
k
Hero
  • Hero
The other trick way to do it is this:
anonymous
  • anonymous
wait
anonymous
  • anonymous
that is hours so what would it be in seconds
Hero
  • Hero
3 1/4 - 1 4/5 (3 - 1) - (1/4 - 4/5) 2 - (5/20 - 16/20) 2 - (11/20) 2 - 11/20 40/20 - 11/20 = 29/20
Hero
  • Hero
29/20 = 1 9/20
anonymous
  • anonymous
that is hours so what would it be in seconds
Hero
  • Hero
Don't convert it into seconds
Hero
  • Hero
just convert it into hours and minutes
anonymous
  • anonymous
oh ya it says minutes my mistake
anonymous
  • anonymous
so howd u do that
Hero
  • Hero
Well you know an hour is 60 minutes, so that takes care of the 1. For 9/20, set up a proportion: 9/20 = x/60 cross multiply: 20x = 540 x = 540/20 x = 54/2 x = 27 minutes So 1 hour and 27 minutes or 60 + 27 = 87 minutes

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