You can put this solution on YOUR website! You can always find a third real number between any pair of real numbers.
In fact, there are infinity of them. It is just a question of "zooming in" and looking for an in-between number to pick.
There are infinite ways to represent a fraction as equivalent fractions, or even decimals. For inspiration, you can express your two numbers different ways to see if you can think of a nice real number to pick in between them.
7 3/5 = 7 6/10 = 7.6 = 7 9/15 = 7 12/20 = ......
7 4/5 = 7 8/10 = 7.8 = 7 12/15 = 7 16/20 = ......
There are many numbers in between those two.
You could pick the one halfway between;
7 7/10 = 7.7
You could pick another rational number in between, like 7 10/15= 7 2/3, or
7 11/15, or 7 13/20, or
7 15/20= 7 3/4 = 7.75
You could even pick an irrational number (they are real too) like or or
