If i add 40 percent alcohol plus 7 is it more alcohol?

It's impossible to say whether adding 7 to 40% alcohol will result in more alcohol without knowing what "7" represents. Here's why:

* 7 needs units: "7" could mean 7 milliliters, 7 ounces, 7 gallons, or something else entirely. You need to know the units of measurement for "7" to understand how it affects the alcohol concentration.

* Dilution matters: Adding 7 units of something else (water, juice, etc.) will dilute the alcohol, lowering the overall percentage.

* It depends on what you're adding: If you add 7 units of pure alcohol, then the overall percentage will increase. But if you add 7 units of something else, the percentage will likely decrease.

Example:

* Scenario 1: If you have 100 ml of 40% alcohol and add 7 ml of pure alcohol, you'll have a higher alcohol concentration.

* Scenario 2: If you have 100 ml of 40% alcohol and add 7 ml of water, you'll have a lower alcohol concentration.

To determine the final alcohol percentage, you need to know:

* The initial volume of the alcohol solution.

* The volume of the substance being added.

* The concentration of alcohol in the substance being added (if applicable).