How many complete pieces of ribbon 7/8cm long can be cut from a roll of ribbin that is 149 cm long

Convert 149 to a fraction (). 
To divide by a fraction, use the inverse or reciprocal (switch the numerator and denimoninator).
The reciprocal of . 
So, multiply those two fractions together (149 x 8 = 1192) (1 x 7 = 7) to get 

The mean is 8
in order to get the mean you take all of the numbers in your set add them up and divide them by how many numbers are in your set. for example your numbers are 12, 15, 6, 4, and 3. you have 5 numbers in this set. your numbers added all together is 40 so then divide that by 5 and you get 8