9 7/9 + 9 1/5;

= 88/9 + 46/5;

= 440/45 + 414/45;

= 854/45;

= 18 44/45

3 4/25+ 6 1/10
= 79/10 + 6 1/10
= 79/25 + 61/10
= 463/50
= 9 13/50

The product of 3 2/3 and 2 1/2 is an improper fraction, which can be simplified or expressed as a mixed number.

3 2/3 = (3 x 3 + 2) / 3 = 11/3
2 1/2 = (2 x 2 + 1) / 2 = 5/2

(11/3) x (5/2) = (11 x 5) / (3 x 2) = 55/6

55 / 6 = 9 with a remainder of 1

So, the result is 9 1/6 as a mixed number.

(1/4)^2 + 3/4 x 1 2/3
= 1/16 + 3/4 x 5/3
= 1/16 + 5/4 (LCD 16)
= (1 + 4 * 5)/16
= 21/16