Is this a problem in Google or update in Google

[lincedpt]

Hello Everyone,

I am not clear on how to explain it.

Here is the issue:

For Example, If you type Yahoo in google.com and search we usually find a number at the right side corner thats the number of pages in google related that keyword

SERP --- 542,000,000


If it suddenly went down from 542,000,000 to 42,000,000

then what will be the problem in google is that a update in algorithm ???????????


The above is the problem which is happening in my client website, Could anyone give a solution