Bonsoir,
a. 315/60 = (15 x 21) / (15 x 4) = 21/4.
b. - 140/224 = (28 x - 5) / (28 x 8) = - 5/8
c. 586/42 = (2 x 293) / (2 x 21) = 293/21
d. 1 764/- 448 = (28 x - 63) / (28 x 16) = - 63/16.
