The length of the three sides of a triangle is half a meter, quarter a meter and three eighth a meter. How many meters is its circumference/

The length of the three sides of a triangle is half a meter, quarter a meter and three eighth a meter. How many meters is its circumference/

Perimeter = 1 / 2 + 1 / 4 + 3 / 8 = 4 / 8 + 2 / 8 + 3 / 8 = 9 / 8 (m) (that is nine eighths of a meter)
A: its perimeter is 9 / 8 meters

Question 1 9 and 15:1 + 99 and 15:2 + 999 and 5:1 + 9999 and 15:4 + 99999 and 3:1 + 5
There should be a process, thank you! ~Who can be faster

9:15 1 + 99:15 2 + 999:5 1 + 9999:15 4 + 99999:3 1 + 5
=（9+99+999+9999+99999）+（1/15+2/15+3/15+4/15+5/15）+5
=9×（1+11+111+1111+11111）+1+5
=9×12345+6
=111111

Three hours is a fraction of a few hours, is how many minutes (score in Chinese); how many hours of two fifths is three hours

Two fifths of the number of hours is three hours
3 △ two fifths = 3 × five fifths = fifteen fifths (hours)
The previous question is whether there is a mistake (3 hours is a fraction of an hour, or how many minutes). If not, it may be that 3 hours is a fraction of an hour, or 180 minutes