Multiply fractions with negatives

Give the answer as a fraction in lowest terms, or a whole number.

1. Evaluate: 2/3 × (−2/3) (Write a fraction in lowest terms, or a whole number.)
2. Evaluate: −3/4 × 1/4 (Write a fraction in lowest terms, or a whole number.)
3. Evaluate: −2/5 × (−3/10) (Write a fraction in lowest terms, or a whole number.)
4. Evaluate: −1/5 × 1/6 (Write a fraction in lowest terms, or a whole number.)
5. Evaluate: 9/10 × 9/10 (Write a fraction in lowest terms, or a whole number.)
6. Evaluate: −1/2 × 1/2 (Write a fraction in lowest terms, or a whole number.)
7. Evaluate: 3/4 × 1/2 (Write a fraction in lowest terms, or a whole number.)
8. Evaluate: −1/8 × (−9/10) (Write a fraction in lowest terms, or a whole number.)
9. Evaluate: −1/5 × 2/3 (Write a fraction in lowest terms, or a whole number.)
10. Evaluate: −1/10 × (−1/3) (Write a fraction in lowest terms, or a whole number.)
11. Evaluate: −1/2 × (−7/10) (Write a fraction in lowest terms, or a whole number.)
12. Evaluate: −5/7 × 1/3 (Write a fraction in lowest terms, or a whole number.)
13. Evaluate: 1/4 × (−1/3) (Write a fraction in lowest terms, or a whole number.)
14. Evaluate: 4/7 × 1/3 (Write a fraction in lowest terms, or a whole number.)
15. Evaluate: −1/3 × 4/5 (Write a fraction in lowest terms, or a whole number.)
16. Evaluate: 2/5 × 3/5 (Write a fraction in lowest terms, or a whole number.)
17. Evaluate: 2/3 × (−4/7) (Write a fraction in lowest terms, or a whole number.)
18. Evaluate: −1/12 × 1/3 (Write a fraction in lowest terms, or a whole number.)
19. Evaluate: 1/2 × (−1/3) (Write a fraction in lowest terms, or a whole number.)
20. Evaluate: −1/2 × (−5/6) (Write a fraction in lowest terms, or a whole number.)