Решите пожалуйста ( 4/5 х 1/6) х (23 2/3 - 15 5/9) х 45/8 - 1/2.

Очень надо 

1)45*16=430=215(cократила на 2)

2)23 23 - 15 59 = 713 +1409= 2139 - 1409= 739

3)215*739=146135

4)145135*458 = 14624=7312

5)7312-12=7312-612=6712

 ( 4/5 х 1/6) х (23 2/3 - 15 5/9) х 45/8 - 1/2 = 

= (4/30)*(23 6/9 - 15 5/9) * 45/8 - 1/2 =

= (2/15)*(8 1/9) * 45/8 - 1/2 =

= 2/15 * 73/9 * 45/8 - 1/2 = 

= 90/120 * 73/9 - 1/2 = 3/4 * 73/9 - 1/2 = 3*73/36 -1/2 = 73/12 - 1/2 =

= 67/12 = 5 7/12 ~ 5.58