If you have ever made a top with a scooped neckline you probably found that the neckline gaps.
I circled a tank on the pattern envelope to show the type of neckline that is frequently too big.
This is the way the front pattern piece looks.
The easy solution to the gaping neckline is to slightly angle the center front (which is supposed to be right on the fold) off of the fold as shown in the photo below. This little tilting of the pattern piece automatically brings the scoop a little closer to the body. You may think that this will distort the grain of the fabric, but it doesn't. The pattern piece should be 1/4 to 3/8th " off of the fabric edge at the top, and then angled back to the fold . That takes just enough out of the bodice front neck to cure the gaps! I have used this technique on V necks also.
P.S. You must remember to do the same thing to the front neck facing.