Which expression is equivalent to 76a^2 b^3 / 19Ab? Assume that the denominator does not equal zero.

17>3

Step-by-step explanation:

You'll have to compass tip on A and draw a small ark with pencil approximately in the middle above AB line, now compass tip to point B and cross the ark you made previously.
Do the same on the opposite side without making any change to the compass 
Join the lines where crosses of arks on the both side meet and then ,it's done.