To find the solution to the equation 5/6 - 3/20, we need to find a common denominator for the fractions. In this case, the common denominator is 20.

Rewriting the fractions with a common denominator, we get:

5/6 - 3/20 = (520)/(620) - (36)/(206) = 100/120 - 18/120

Now we can subtract the fractions:

100/120 - 18/120 = (100 - 18)/120 = 82/120

Finally, we can simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 2:

82/120 = 41/60

Therefore, the solution to the equation 5/6 - 3/20 is 41/60.