Say you start a SIP of Rs 5,000, and the current NAV of the fund is Rs 100. So, after the SIP is debited from your account, you will receive 50 units (Rs 5,000 / Rs 100) of the mutual fund scheme. And let’s say at the time of your second SIP, the NAV of the fund increases to Rs 110; then, in this case, you will have 45.45 units. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.