G3b (15) (19)/(38)= (16) (12)/(48)= (17) (36)/(54)= (18) (38)/(57)= (19) (48)/(64)= (20) (18)/(72)= (21) (24)/(72)= (22) (30)/(75)= (23) (50)/(75)= (24) (29)/(87)= (25) (58)/(87)= (26) (31)/(93)= (27) (62)/(93)= (28) (88)/(110)=

(15) $$\frac{19}{38} = \frac{1}{2}$$
(16) $$\frac{12}{48} = \frac{1}{4}$$
(17) $$\frac{36}{54} = \frac{2}{3}$$
(18) $$\frac{38}{57} = \frac{2}{3}$$
(19) $$\frac{48}{64} = \frac{3}{4}$$
(20) $$\frac{18}{72} = \frac{1}{4}$$
(21) $$\frac{24}{72} = \frac{1}{3}$$
(22) $$\frac{30}{75} = \frac{2}{5}$$
(23) $$\frac{50}{75} = \frac{2}{3}$$
(24) $$\frac{29}{87} = \frac{1}{3}$$
(25) $$\frac{58}{87} = \frac{2}{3}$$
(26) $$\frac{31}{93} = \frac{1}{3}$$
(27) $$\frac{62}{93} = \frac{2}{3}$$
(28) $$\frac{88}{110} = \frac{4}{5}$$