Inflation rounding

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Dear Office for National Statistics,

The consumer price month index number for November 2017 was 104.6:
https://www.ons.gov.uk/economy/inflation...

When compared to the November 2016 index number of 101.4 this is a 104.6/101.4 = 1.031558 = 3.16% increase over 12 months.

So why is the reported CPI 12-month percentage change figure for November 2017 3.1% rather than 3.2%?

Yours faithfully,

Brian Harrison

ONS FoI Team, Office for National Statistics

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FOI Team, Office for National Statistics

Our Reference: FOI 3551

Dear Brian

Thank you for your email requesting data pertaining to Consumer Price
Index figures for 2017.

I am writing to confirm that the Office for National Statistics has now
completed its search for the information which you requested and the
response can be found here:
[1]https://www.ons.gov.uk/aboutus/transpare...

You have the right to have this response to your freedom of information
request reviewed internally by an internal review process and, if you
remain unhappy with the decision, by the Information Commissioner. If you
would like to have the decision reviewed please write to The FoI Team,
Room 1100, Office for National Statistics, Segensworth Road, Titchfield
PO15 5RR, and mark your correspondence "Internal Review".

If you have any queries about this email, please contact the Freedom of
Information Team ('[ONS request email]')

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communications.

Freedom of Information Team
Office for National Statistics For information on the work of the UK
Statistics Authority, visit: http://www.statisticsauthority.gov.uk

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Legal Disclaimer: Any views expressed by the sender of this message are
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