When you have a big number in front of the fraction then you have to plus or subtract it from another big number and fraction how would you answer that question

do you mean how would you solve it? well you turn it into an improper fraction which means you multiply the big number by the denominator and add the product with the numerator and do the same thing for the other fraction, once that's done make sure the denominator on both fractions is the same and add or subtract the numerators.

Step-by-step explanation:

for example 3 4/5 + 5 4/5 = 19/5 + 29/5 = 48/5