Book Maths Puzzle Time and Work

On Wednesday, John drove to school in 45 minutes. On thursday, he had a test at school so he averaged 12 miles per hour more and it took him 9 minutes less to get to school. How f

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what is 13 2/5 + 4 1/5 = the answer is supposed to be reduced to the lowest term.
Also what is 4 5/7 - 2 1/7 = this answer is also supposed to be redused to the lowest term
I kee find the total amount of of 98 pecent of blank is 245 78 percent of blank is 319.8 24 percent of blank is 0.36