Answer:
1. 3:4 3/4 75% 0.75 three fourths
2. 0.25 1/4 25% 1:4 one fourth
3. 6 tenths = three fifths 3/5 60% 0.60 3:5
4. 1/3 one third 1:3 0.33 33%
5. 80% 4/5 4:5 four fifths 0.8
6. 19/20 95% 0.95 nineteen twentieths. 19:20
7. 1 and 5 tenths 1.5 1 1/2 150% 3/2
8. 7:8 7/8 0.875 87.5% seven eighths
I believe this is everything you asked but if I didn't give something just tell me and I'm 99.9% sure all of these are correct. Hope this helps!