Answer:
1. Yo tengo menos dinero que Rafael.
2. Elena es mayor que Juan.
3. Enrique come tantas hamburguesas como José.
4. La comida de La Fonda es mejor que la comida del Café Condesa
5. Los camarones cuestan menos que las langostas.
Explanation:
You should compare the situations:
1. I have less money than Rafael.
2. Elena is older than Juan.
3. Enrique eats as many hamburgers as José.
4. La Fonda's food is better than Cafe Condesa's food
5. Shrimp cost less than lobsters.