Answer:
1. n + 7 ≤ 9
2. 3w < 18
3. 3 < s + 4
4. 4 ≥ x/2.1
Both of the top numbers are 1/2 of the bottom number. To check, multiply the top and bottom numbers of 2/4 by 2 and you will get 4/8. (Hopes this helps, have a nice day.)
