You multiply the numerator and the denominator of the complex fraction by the complex conjugate of the denominator.
The complex conjugate of a + bi is a - bi.
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You don't. 4/7=4/7, unless you are looking for a complex fraction.
To simplify a fraction, find the GCF of the numerator and the denominator and divide them both by it. If the GCF is 1, the fraction is in its simplest form.
Multiply top and bottom by the complex conjugate of the bottom complex number; this will make the bottom complex number into a real number which can then be made into fractions and simplified with the real part and the imaginary part (the multiplier of i [√-1]) of the multiplied out top number.
130 is an integer, not a fraction.
48 as a fraction = 48/1