45 minutes(0.75(75 tenths)is 75% of an hour or 3quarters 60 minutes divided by 4 multiplied by 3 = 45)
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75 is 750 tenths, or 7500 hundredths.
2.5 hours is equal to 25 tenths of an hour.
75 tenths is the same as saying 75 over 10 or 75 x 0.1 it is therefore expressed at 75/10 which cancels to 15/2
No 0.75 = 75 hundredths 0.8 = 8 tenths so 0.8 is 0.05 larger than 0.75
75/10 = 7.5