math math math math math!!!?

2 ⤊

One task took 7 minutes (min), a second task took 12 min, and
a third task took 21 min. How long did the three tasks take, as a fraction of an hour?

2007-03-28 15:03:07 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

7+12+21=40.

40/60=4/6 or 2/3

2007-03-28 15:06:30 · answer #1 · answered by Tina 2 · 1⤊ 0⤋

7+12+21=40
theres 60 min in an hour, so you put the 40 on top and 60 on the bottom.
40/60
simpilfy to 2/3

2007-03-28 22:14:37 · answer #2 · answered by Anonymous · 0⤊ 0⤋

7+12+21= 40
60 minutes in one hour

40/60
2/3 of an hour

2007-03-28 22:06:44 · answer #3 · answered by br0hamus 2 · 1⤊ 0⤋

17 seconds faster than youll ever FIGURE IT OUT YOURSELF!!!!

2007-03-28 22:10:20 · answer #4 · answered by threeonspeed 4 · 0⤊ 0⤋