Verdict. The Microsoft Lumia 638 is an attractive budget friendly smartphone with the latest Windows OS and support for 4G LTE Cat4. It features a powerful Qualcomm Snapdragon processor but the lack of front camera is a big disappointment.
Steps. 1. Make sure that the denominators of every fraction that you're going to add or subtract are the same. 1  If the numbers are different, you can't add or subtract the fractions as-is.2  You can, however, perform the operations necessary to create fractions with like denominators, in which case you can add and subtract them.teps. 1. Make sure that the denominators of every fraction that you're going to add or subtract are the same. 1  If the numbers are different, you can't add or subtract the fractions as-is.
How to convert fraction to decimal. Method #1. Expand the denominator to be a power of 10. Example #1. 3/5 is expanded to 6/10 by multiplying the numerator by 2 and denominator by 2: Example #2. 3/4 is expanded to 75/100 by multiplying the numerator by 25 and denominator by 25: Example #3.