We'll do the first one. I can't read the variable, but it looks like a

so that's what I'll use, but it doesn't matter.
First, get the variable by itself:

You get that before you multiply each side by two.
Now, you color the line so that all values that are less than 6 are shaded, so you put an open circle at 6 since it's not included and then you shade everything to the left.
Answer:
146%
Step-by-step explanation:
To find the percent increase/decrease:
1. Subtract the original value from the new value.
2. Divide by the original value.
3. Multiply the decimal by 100 to convert to a percent.
98.9 - 40.2 = 58.7
58.7/40.2 = 1.46
1.46*100 = 146%
As an expression, it would be:
3 - 1/13w (or you could also do 1/13w - 3).