An irrational number is one possible answer.
5.625 = 45/8 = 5 + 5/8
Number!
0.125 = 125/1000 = 1/8
2 1/4
It is impossible to express 8/17 as an exact decimal as it has 16 digits that recur: 8/17 = 0.47058823529411764705882352941176...
If you express is as a mixed number, it is 8 and 4/100. However, if you express it as an improper fraction (as most people do), it is 804/100.
You can't express 23/8 as just one whole number; the result is not integral. The nearest you can come is "2 with a remainder of 7".
Quark is a page layout system for publishing including desktop publishing. 8 is how many prior versions there have been. As you can see, Quark Express has been around for a long time.
these are used to express very large number small and very small
Is my bank account number the same number on the front of my direct express card
Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, the way you wrote the number is the standard form for your example.