Answer
$\frac{1}{y^7}$
Work Step by Step
We start with the given expression: $\frac{y^3}{y^{10}}$
To divide powers with the same base, we subtract the exponents. When the bigger power is in the denominator, we subtract the power in the numerator from the power in the denominator, and leave the term in the denominator: $\frac{1}{y^{10-3}}=\frac{1}{y^7}$
