## Algebra and Trigonometry 10th Edition

$\frac{3}{10y^{3}}$
Original Expression : $\frac{18y^{2}}{60y^{5}}=\frac{(6y^{2})(3)}{(6y^{2})(10y^{3})}=\frac{3}{10y^{3}}$ with y≠0 as y=0 would make the denominator in the original expression zero and division by 0 is not allowed.