Fraction Exponent Calculator x^(a/b) = ᵇ√(xᵃ). x Numerator Denominator Result 64 Step-by-step with your numbers: 1. Values used: 2. x = 16 3. Numerator = 3 4. Denominator = 2 5. Result = 64 Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! x^(a/b) = the b-th root of x^a. FAQ Negative x? Only integer exponents. Related calculators Exponent Calculator Raise a base to a power. Nth Root Calculator Find the nth root of a number. Power of a Power Calculator Simplify (base^a)^b.