7/8 of 40 = 35
40 divided by 8 = 5, so, 7 eighths or 7 fives is 35.
7/8 x 40 is 35.
7/5*7/8 = 49/40 or 1.225
7/8 - 1/5 = 35/40 - 8/40 = 27/40
You haven't said what the 7 eighths are 7 eighths of, and that's going to make all the difference in the answer. -- If it's 7 eighths of a millimeter, then there are 7 eighths of a millimeter in it. -- If it's 7 eighths of an inch, then there are 22.225 millimeters in it. -- If it's 7 eighths of a foot, then 266.7 millimeters. -- If 7 eighths of a meter, then 875 millimeters. -- If 7 eighths of a mile, then 1,408,176 millimeters. -- If 7 eighths of a day, or 7 eighths of a pound, or just plain 7 eighths with no unit, then none.
7 fortieths 1/5 x 7/8 = 1x7 / 5x8 = 7/40
3/8 + 4/5 = 15/40 + 32/40 = 47/40 = 1 + 7/40
the common denominator for 9/8 and 7/20 is 40. (45/40 and 14/40)
7 x 2 = 14 8 x 5 = 40 7/8 = 2/5 = 14/40 = 7/20
2/5 x 7/8 = 14/40 or 7/20 or 0.35
5/8 minus 4/5 is -7/40