Write and solve a proportion to find what number is  $68\%$68%​  of $25.$25.​$\frac{a}{25}=$a25​=​ $=$=​

Sure, let's solve this step by step.

1. First, we set up the proportion. In this case, we're trying to find what number (let's call it 'a') is 68% of 25. We can express this as a proportion like this: a/25 = 68/100.

2. Next, we solve the proportion. To do this, we can cross-multiply:

   a * 100 = 25 * 68

3. Then, we simplify the right side of the equation:

   a * 100 = 1700

4. Finally, we solve for 'a' by dividing both sides of the equation by 100:

   a = 1700 / 100

   a = 17

So, 68% of 25 is 17.