On making fractions as decimal numbers:
Divide the Numerator by the Denominator.
and that, I think is the reason why the slash sign "/" is also used for fraction (e.g. 2/4, and division (e.g. 4 / 2 = 2) , which indicates both division, so same on division the number/value up (numerator) is going to be divided by the number/value down (denominator)
Calculating your problem . . .
3/4 =3 divided by 4 "Replace the "/" sign on the fraction with an obelus =3 ÷ 4 sign (÷) or the phrase ∞divided by∞"
=0.75 "Do the operation, it can be either a decimal or a whole number"