The question is asking what is 15% of $300.
"of" means multiply, and 15% is the same as 0.15 (% means divide by 100), so you have
0.15 * $300 = $45.
Assuming 5/2y is the fraction,
= y + 5/2y + 10
You can divide the entire fraction (both numerator and denominator) by 2
= y + 2.5/y + 10
That is as far simplified, or 'lowest terms' as it gets.
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G(x) =-16 hope this helps