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a. 234/342 = (18 x 13) / (18 x 19) = 13/19

b. 360/405 = (45 x 8) / (45 x 9) = 8/9

c. 612/1 044 = (36 x 17) / (36 x 29) = 17/29

d. 150/240 = (30 x 5) / (30 x 8) = 5/8

e. 87/123 = (3 x 29) / (3 x 41) = 29/41

f. 130/124 = (2 x 65) / (2 x 62) = 65/62

g. 95/115= (5 x 19) / (5 x 23) = 19/23

h. 378/459 = (27 x 14) / (27 x 17) = 14/17.