0,4-+8(5-0,8*5/8)-5:2 1/2 (дробная черта) (1 7/8*8-(8,9-2,6:2/3))*34 2/5

$\frac{0,4+8*(5-0,8* \frac{5}{8})-5:2 \frac{1}{2} }{(1 \frac{7}{8}*8-(8,9-2,6: \frac{2}{3}))*34 \frac{2}{5} }=0,1$
1. $0,8* \frac{5}{8}= \frac{4}{8}= \frac{1}{2}=0,5$
2. $5-0,5=4,5$
3. $8*4,5=36$
4. $5:2 \frac{1}{2}=5: \frac{5}{2} = \frac{5*2}{5}=2$
5. $0,4+36=36,4$
6. $36,4-2=34,4$
7. $2,6: \frac{2}{3}=2 \frac{6}{10}: \frac{2}{3}= \frac{26}{10}: \frac{2}{3}= \frac{26*3}{10*2}= \frac{39}{10}=3,9$
8. $8,9-3,9=5$
9. $1 \frac{7}{8}-8= \frac{15}{8}*8=15$
10. $15-5=10$
11. $10*34 \frac{2}{5}= \frac{10}{1}* \frac{172}{5}=344$
12. $34,4:344=0,1$