Respuesta :

400/ (77*100+ 2000 -55+ 999)
= 400/ (7700+ 2000 -55+ 999)
= 400/ 10,644
= 100/2661

The final answer is 100/2661~
400 ÷ 77 x 100 + 2000 - 55 + 999 

u would use dmas :
1. division
2. multiplication
3. addition
4. subtraction

400 ÷ 77 = 5.19 

5.19 x 100 + 2000 - 55 + 999 

5.19 x 100 = 519

519 + 2000 - 55 + 999

519 + 2000 + 999 = 3518

3518 -55 = 3463 

hope this helps