"on the same month" is grammatically correct and can be used in written English.
Example: I met my best friend in September, and we found out that we were born on the same month.
This was 1.1% higher than August and 3.2% up on the same month a year earlier.
Post Office says its sales of the Croatian kuna in April were up 91% on the same month in 2014.
The Scottish Motor Trade Association SMTAA) said more than 38,000 vehicles were sold in March, up almost 10% on the same month in 2012.
The figures, from the British Bankers Associationn (BBA) showed that there was £11.5bn of gross mortgage borrowing in February, up 47% on the same month last year.
House prices rose by 0.6% in February, a 9.4% increase on the same month in 2013, according to the Nationwide Building Society.
Car sales in March were down by 32% on the same month in 2008.
Despite a slight dip in September, lending for that month was up 41% on the same month last year, at £16bn.
The Associated Newspapers website network registered 2,939,799 average daily users last month, up by 6.56% from October and 55.77% on the same month last year.
In September the Glasgow-based Herald lost 1.94% on August and 9.61% on the same month last year to record an average of 57,031.
January bookings were up on the same month last year.
The Rightmove report said the average asking price reached £245,495 in September, a 4.5% increase on the same month a year earlier.
