8/4 - 10/5 = 40/20 - 40/20 = 0
8/4 (2) - 10/5 (2) = 0
4
4 and 5 are both times by 2
4/5 * 10/13 = 40/65 = 8/13.
(3/4)(16/21)(7/10)=(2/5) or 2 over 5, or 2 fifths.
9/10
Eight over Three.
5/10 x 3/4 = (5x3)/(10x4) = 15/40 = 3/8
5/2 = 2.5 x -4 = -10 + 4 = -6
7/8 x 4/5 = 28/40 or 7/10
2 and 1 over 10 or 2.1
28/40 or 7/10
(4/5)*(-3/8) = [4*(-3)]/(5*8) = -12/40 = -3/10