I can't tell if '169' is also inside the radical.
If it is, then the fraction is the same as ( √64 / √169 ) . You can easily find both of those square roots, and the result is (8 / 13) = about 0.6154... (rounded).
If the '169' is NOT inside the radical, then you have (√64) / 169 . You know what the square root of 64 is, so the result is
8 / 169 = about 0.04734... (rounded)
The evaluation of 169 64 simplifies to 13 8 . This value is also approximately 0.6154 when expressed in decimal form.
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