(5+12+13)/3 = 10 is the average
eg: 10% = .10 5%= .05 13%=.13 20%=.20
30
If that's 5/12, 10/13 and 7/9, the LCD is 468.
5. This is the number which is the furthest from the others.
The sum of 18 and 15 is 33. 10+10=20 & 8+5=13. 20+13=33.
The fraction halfway between 2/5 and 9/10 is 13/20
1, 2, 4, 5, 10, 20 1, 5, 13, 65
12.5
Example 2/4 + 4/5 convert that to 2/4 = 10/20 4/5 = 16/20 10/20 + 16/20 = 26/ 20, reduce that to 13/10
18/20 - 5/20 = 13/20
25 different ways: 20, 20, 20, 20, 5 20, 20, 20, 10, 10, 5 20, 20, 20, 10, 5, 5, 5 20, 20, 20, 5, 5, 5, 5, 5 20, 20, 10, 10, 10, 10, 5 20, 20, 10, 10, 10, 5, 5, 5 20, 20, 10, 10, 5, 5, 5, 5, 5 20, 20, 10, 5, 5, 5, 5, 5, 5, 5 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5 20, 10, 10, 10, 10, 10, 10, 5 20, 10, 10, 10, 10, 10, 5, 5, 5 20, 10, 10, 10, 10, 5, 5, 5, 5, 5 20, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5 20, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5 20, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 10, 10, 10, 10, 10, 10, 10, 10, 5 10, 10, 10, 10, 10, 10, 10, 5, 5, 5 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5