The simplest form is 15/28
Correct me if I'm wrong. Hope this helps!
If you know the LCM then you divide it by the other number.
If you don't already know it: is 8 a factor of 9 or do they have equal factors? No.
Is 9 a factor of 8 or do they have equal factors? No.
The easy way: multiply 8 by 9 to get LCM :)
12 to 16 because all ratios are equivalent
I believe it is -1 since -3 times -1 equals 3 and the rate of change is based on the slope of a line