(No offense to Neela, but 0.35 x 60 is not 39 but 21)

To convert 3.35 hours into hours and minutes,

First, 60 min = 1 hr

0.35 hr

= 35/100 x 1 hr

= 7/20 hr

= 21/60 hr

= 21 min

So 3.35 hr = **3 hr 21 min**

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Just a note:

I am always very wary about time or time durations with a decimal point. In some cases, "hr" is written at the end of 4 digits to indicate time in the 24hr clock. There are also cases where a "." separates the hour and the minute. This can be confused with time duration in hours that involves decimal points.

3.35 hours to express in hours and minutes.

In 3.35 hours 3 is hours and 0.35 hours is the only fractioal part. So there is no change 3 hours. We have covert only 0.35 hours.

We know that 1 hour = 60 minutes.

Therefore we have multiply 0.35 by 60 get the number of minutes in 0.35 hours.

So we do the multiplication of 0.35 and 60:

0.35*60 = 39.

Therefore 0.35 hours = 39 minutes.

Therfore 3.35 hours = 3hours 39 minutes.