What is a equivalent fraction for 24/30

There's an infinite number of equivalent fractions for 24/30 - all you need to do is to divide or multiple both numerator and denominator by the same number. For example:

24/30 = 48/60 (because 24 * 2 = 48 and 30 * 2 = 60)
24/30 = 12/15 (because 24 ÷ 2 = 12 and 30 ÷ 2 = 15)
24/30 = 72/90 (because 24 * 3 = 72 and 30 * 3 = 90)
24/30 = 4/5 (because 24 ÷ 6 = 4 and 30 ÷ 6 = 5)
etc...

Follow PEMDAS. First is multiplication.

Follow the FOIL method: (First, Outside, Inside, Last)
(8 - 3i) - (8 - 3i)(8 + 8i)
8(8) = 64
8(8i) = 64i
-3i(8) = -24i
-3i(8i) = 24   (note: two "i"'s = -1)

Combine like terms

64 + 64i - 24i + 24

64 + 40i + 24

88 + 40i

Now subtract 88 + 40i from 8 - 3i

(8 - 3i) - (88 + 40i) = -80 - 43i (Note: the signs in the parenthesis change,                                                          because you are subtracting as a whole)

-80 - 43i is your answer

hope this helps