Как написать на англиском 8.70 , 27.99 , 1/4, 3/4, 3/2, 8/7, 12 1/2

8.70 - eight point seven tenths
27.99 - twenty-seven point ninety-nine per cent
1/4 - one quarter
3/4 - three-quarters
3/2 - three second
8/7 - eight seventh
12 1/2 - twelve point one second