It may be easier to calculate your dosage if you consider your WEEKLY dosage, rather than what you take each day. This way, if you decide to change your dosage, it would probably be easier to figure out what changes you may want to make and, if necessary, to spread them out during the week, and still hit your target. (In my case, I was taking 51.5/week, but my INR seemed to go a bit higher than desirable - but only slightly out of range. This corresponded to 7 mg six days and 10 mg the seventh day. I dropped it to 49 - and the drop was easy -- 7 mg every day). Basing your changes on a weekly dose really seems to make it easier to handle - and to calculate - dosage changes. In your case, you're taking 62.5 mg/week. From that, it's easy to figure that a 5% increase would be an additional 3 mg/week (probably a 7.5 mg plus a 1 mg pill three days a week (MWF?) and a 7.5 mg pill the alternating three days a week(TuThSa?), with a 10 mg one day(Su?), or a 10% increase would be 6 mg (ignoring the 2.5 mg) - or 7.5 mg plus 1 mg for six days and 10mg on a seventh day. I'm not suggesting that this is what you should do - you should check with your physician or clinic -- I'm only showing this as an example of how to calculate your weekly dosage and how to calculate increases. Doing it this way makes it fairly easy to make changes.
In order to be sure you got your daily dose, it may be worthwhile to invest in a seven day pill holder. Put each daily dose in the appropriate compartment. This way, you should be able to see at a glance if you missed a dose, and can then respond appropriately.