Saying decimals and fractions

Decimals
English uses a point (.) for decimal numbers. The numbers before a decimal point are said normally. All the digits after a decimal point are said separately.
1.25 – one point two five
12.46 – twelve point four six
If a decimal point is a unit (e.g. of money), both parts can be said like normal numbers.
€87.65 – eighty seven euros sixty five eurocents

Fractions
Most fractions are said using ordinal numbers.
3/7– three sevenths                                        1 ½ - one and a half                        1/2- a half
5/32 – five thirty seconds                              2 2/3 - two and two thirds                 1/3 – a third
                                                                                                                             1/4- a quarter