Multiply the numerator by the reciprocal of the denominator.

Multiply by .

Subtract from .

Multiply by .

Multiply and .

Raise to the power of .

Raise to the power of .

Use the power rule to combine exponents.

Add and .

Rewrite as .

Use to rewrite as .

Apply the power rule and multiply exponents, .

Combine and .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Evaluate the exponent.

Evaluate the root.

Multiply by .

Divide by .

Multiply by .

Simplify (0.2167-0.25)/(( square root of (0.25)(0.75))/420)