Whats a decimal fraction that lies in between 2 numbers?

Answer 1

0.7 is a decimal fraction that lies in between 1 and 2.
A decimal is a whole number and its fraction separated using a "." sign. To the left of the sign, whole numbers are written and to the right, fractions of whole are written in places: tenths, hundredths, thousandths, etc.

Essentially fractions can be divided to give decimal answers. For instance, 1/2 can be read as 1 "divided by" 2 which is equal to 0.5 so written as it is half of 1 whole or 5/10 (notice that there is one number (5) after the decimal, ".", making it in the tenths place). If the decimal where 0.125 (1/8), then the 125 is too large to be in the written over 10 (tenth) and too large to be written over 100 (hundredth), and thus its fraction equivalent should be written written as 125/1000 = 1/8. This is also a clue as to what place it is in (thousandths).

Examples of numbers written in decimals include but are not limited to 5.375, 2.85, 25.3, 1524.785612.

Hopefully that helps.

Answer 2

If the two numbers are p and q, you could try r = x*p + (1-x)*q where x is a number between 0 and 1.