These are decimal numbers, and dots above some of the digits make them recurring decimals. One dot means the digit under it repeats infinitely. In other words, it goes on forever (and ever and ever).

in form "n/m" where n and m are integers. Eg.: from_string_to_fraction("-2.5(37)") returns "-1256/495". If the number is a repeating decimal, its peridod should appear between round brackets. It needs ...