It's most likely to be degrees, minutes and decimals. If you put it in your system just check its configured the same if you're trying to input degrees, minutes and seconds it will be confusing (can't do 75 seconds).
If your system wants three digits for the last number add a zero on the end (750). It won't make bugger all difference unless you're doing needle/haystack type stuff. The third digit is down to about 2m accuracy.
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