Y= y1
replace the y1 with the ordinate ( the y-part) of the point you are going thru
example a horizontal line going through the point (7,12) would be y=12
I KILOGRAM IN GRAMS IS 1,000 grams, SO 7.4 TIMES 1000 IS 7,400
4(4)+ 2(-5) = 6
16+ (-10) = 6
K is whatever you want it to be
54% is 54 out of 100.
There for the numerator is 54 and the denominator is 100.

Now, both the top and the bottom can be divided by 2. So:

=


can't be simplified anymore, therefore, 27/50 is 54% as a fraction.
~Hope this helped :)