(6 4/15 hours/day)*5 = (6*5 + (4/15)*5) hours/day

= (30 + 20/15) hours/day = (31 5/15) hours/day = 31 1/3 hours/day

Alternatively, you can convert 6 4/15 to an improper fraction (15*6+4)/15 and then multiply by 5.

(6 4/15)*5 = (15*6+4)/15*5 = 94*5/15 = 94/3 = 31 1/3

= (30 + 20/15) hours/day = (31 5/15) hours/day = 31 1/3 hours/day

Alternatively, you can convert 6 4/15 to an improper fraction (15*6+4)/15 and then multiply by 5.

(6 4/15)*5 = (15*6+4)/15*5 = 94*5/15 = 94/3 = 31 1/3