What is the plural of 100?

The names of numbers from 1 to 100, in English, are:

1. one
2. two
3. three
4. four
5. five
6. six
7. seven
8. eight
9. nine
10. ten
11. eleven
12. twelve
13. thirteen
14. fourteen
15. fifteen
16. sixteen
17. seventeen
18. eighteen
19. nineteen
20. twenty
21. twenty-one
22. twenty-two
23. twenty-three
24. twenty-four
25. twenty-five
26. twenty-six
27. twenty-seven
28. twenty-eight
29. twenty-nine
30. thirty

For 31 to 39, add a hyphen - after "thirty" and add the single number (same as above for 21 to 29.

40. Forty

For 41 to 49, again add a hyphen - then add the single number.

50. Fifty

For 51 to 59, again add a hyphen - then add the single number.

60. Sixty

For 61 to 69, again add a hyphen - then add the single number.

70. Seventy

For 71 to 79, again add a hyphen - then add the single number.

80. Eighty

For 81 to 89, again add a hyphen - then add the single number.

90. Ninety

For 91 to 99, again add a hyphen - then add the single number.

100. One hundred

For all 3-digit numbers in English, start with the "hundredths" and add the double-digit number, for example:

398 would be three hundred ninety-eight. (ninety-eight is a double-digit number)