If you've invested in a home blood pressure monitor - and if you haven't yet done so then I recommend that you do - you need to learn how to read high blood pressure numbers.
I usually tell people to get in the habit of keeping a paper chart or diary of their readings, although I know that some prefer to use a computer software program or even nowadays an iphone app.
Your monitor will display two numbers on it after the reading.
These will be something like this: 145:78 or 129:72 and so on.
The first number is the systolic blood pressure level. The second is the diastolic. Your readings should be less than 160 and less than 90 for the two numbers respectively. If you are already on blood pressure treatment then you should aim for readings less than 140/80 if you can.