0.510416667= seven eighths divided by twelve sevenths
20 divided by 2/7 is 70.
two sevenths simply means 2/7 so when someone asks what two sevenths of 12 are they mean (2/7)*12 = 24/7 which simplifies to 3 and two sevenths or in decimal form: 3.2857 (approximately).
77 divided by two is 38.5 or 38 and .5 seventy sevenths.
It is 14/9
20/21
2 and 31/35
2/7 + 2/7 = 4/7 / 2 = 2/7
519/20
1 and 1/6
182/45
12/35