Simplify Each of the Following $\left(\frac{5}{6}\right)^{2}-\left(\frac{6}{10}-\frac{3}{4}\right)$

Short Answer

Simplify each of the following. Use the order of operations as needed.
- $\left(\frac{5}{6}\right)^{2}-\left(\frac{6}{10}-\frac{3}{4}\right)$