Adding/subtracting fractions = common denominator and then from there you either add or subtract the numerators
Multiplying fractions = multiply the numerator times the numerator and denominator times denominator
Dividing fractions = reciprocal (aka flip) the second fraction then just multiply numerator times numerator and denominator times denominator.
Anything with prevents you can just move the decimal two places to the right so 5% is the same thing as .05 or if you want in fraction form then you just divide by 100 so 5% is also 5/100 is also .05
Easy stuff, u should do well