Multiply and express as a mixed fraction :
(a) 3 × $5\frac{1}{5}$  (b) 5 × $6\frac{3}{4}$ (c) 7 × $2\frac{1}{4}$
(d) 4 × $6\frac{1}{3}$  (e) $3\frac{1}{4}$ × 6   (f) $3\frac{2}{5}$× 8

a) 3 × $5\frac{1}{5}$ = 3 × 26/5

= (3 × 26)/5

= 78/5

changing into a mixed fraction, we get

78/5 = $15\frac{3}{5}$

(b) 5 × $6\frac{3}{4}$ = 5 × 27/4

= (5 × 27)/4

= 135/4 

changing 135/4 into a mixed fraction, we get

135/4 = $33\frac{3}{4}$

(c) 7 ×$2\frac{1}{4}$= 7 × 9/4

= (7 × 9)/4

= 63/4 

changing 63/4 into a mixed fraction, we get

63/4 = $15\frac{3}{4}$

(d) 4 × $6\frac{1}{3}$ = 4 × 19/3

= (4 × 19)/3

= 76/3 

changing 76/3 into a mixed fraction, we get

76/3 = $25\frac{1}{3}$

(e) $3\frac{1}{4}$ × 6 = (13/4) × 6

= (13 × 6)/4

= 78/4 

changing 78/4 into a mixed fraction, we get

78/4 = $19\frac{1}{2}$

(f) $3\frac{2}{5}$ × 8

= (17/5) × 8

= (17 × 8)/5

= 136/5

changing 136/5 into a mixed fraction, we get

136/5 = $27\frac{1}{5}$