Math
posted by Angela .
Solve Mentally with conversion to decimals, no calculation of common denominators. Place the following in ascending order(smallest to largest)
1/4
8/9
7/10
9/21
7/16
2/3
2/47
5/6
3/4
3/5
1/13
1/8

do what was suggested. As decimals, you have
.25 .88 .70 .42 ...
then sort them as desired. 
Can you convert these fractions to decimals?
http://www.mathsisfun.com/convertingfractionsdecimals.html
http://math2.org/math/general/arithmetic/fradec.htm 
How would you solve this problem using mental math (no conversion to decimals, no calculations of common denominators)in ascending order. Explain how you placed each one
1/4
8/9
7/10
9/21
7/16
2/3
2/47
5/6
3/4
3/5
1/13
1/8 
Hmmm. Originally it said to use conversion to decimals. Now you say no conversion and no common denominators. Unless you have a really good feel for relative values of fractions, I don't see any tricks to use to sort such a list.