On chip maker Intel's (NASDAQ:INTC) most recent earnings call, CFO Stacy Smith remarked that over 70% of the company's operating profit came from the company's Internet of Things, data center, and NAND businesses. The purpose of highlighting this number was likely to give the impression that the company has substantially diversified its revenue base from the declining PC market. 

While Intel is indeed seeing its business mix shift away from the PC as the company's "growth" segments, well, grow and as the PC market declines, the 70% figure doesn't quite sit right with me. Although mathematically accurate, I believe it understates Intel's dependence on the PC market. Allow me to explain. 

The "client computing group" sleight of hand
Prior to the first quarter of 2015, Intel used to break out its PC client group as a separate business unit from its mobile and communications group. The PC client group brought in the majority of the company's revenue and contributed substantially to the company's operating profit.

The mobile and communications group, on the other hand, generated minimal revenue (even dipping into negative territory in the final quarter of 2014) and steep operating losses. 

To understand the "trick" that Intel is performing, I would like to direct your attention to the table below from Intel's fourth quarter 2014 earnings release:

Intel Financial Table

Source: Intel

Looking at the above table, I could truthfully make the following statement: "51% of Intel's operating income in 2014 came from the data center and Internet of Things groups." I could also make the following correct statement: "95.3% of Intel's operating income in 2014 came from the PC client group."

But, of course, a quick sanity check would tell you that these statements aren't all that useful. 

The problem is that in these numbers Intel has two reporting segments -- in this case "all other" and the "mobile and communications group" -- that are running substantial operating losses, making the math calculating the operating income percentage contributions from the various segments a bit weird. 

Digging into Intel's 70% number for the second quarter
Let's turn our attention back to the 70% number given for the second quarter. Intel reported total operating income for the quarter of $2.896 billion. The breakdown of that operating income by segment can be seen in the following table:

Financials Q

Source: Intel

Here are the percentage contributions by segment to the company's operating profit in the quarter:

Segment

Operating Profit % (Q2 2015)

Client Computing Group

55.3

Data Center Group

63.6

Internet of Things

5.0

Software and Services

0.4

All other

-24.44

Source: author

While the 70% number might make it seem as though Intel has effectively diversified away from the PC market, the company's client computing group alone still brought in 55.3% of the company's operating profits in the quarter. The reason for these weird numbers is, once again, the fact that there is an "all other" segment that is losing money, which inflates the percentage of the total profit pool to which the other segments appear to contribute.

It gets even better, though. If we assume Intel's former mobile and communications group lost about $1 billion in the quarter (this is just a ballpark estimate), then this would mean the former PC client group brought in about $2.6 billion in operating profit.

That's still more than any other of the company's operating segments.

Intel is still a PC-dependent company, whether we like it or not
At the end of the day, Intel still depends very heavily on the sale of PC chips. Intel has done a good job capturing growth in other areas, most notably in the data center, but when a business as large as Intel's PC processor business declines, it takes a lot to offset those declines. 

Ashraf Eassa owns shares of Intel. The Motley Fool recommends Intel. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.