Convert decimal to binary

Today I want to tell you how to change a decimal number to binary ..
from number 300 to 500

look at this :

Desimal to binary

1.349 = 256 + 64 + 16 + 13

           = 101011101

2.425 = 256 + 128 +32 + 9   

           = 110101001

3.367 = 256 + 64 + 32 + 15
           = 101101111

4. 475 = 256 + 128 + 64 + 16 + 11

            = 111011011

5. 441 = 256 + 128 + 32 + 16 + 9

            = 110111001

6. 389 = 256 + 128 + 5

            = 110000101

7. 305 = 256 + 32 + 16  + 11

            = 100110001

8. 415 = 256 + 128 + 16 + 15

            = 110011111

9. 500 = 256 + 128 + 64 + 32 + 16 + 4

            = 111110100

10. 421 = 256 + 128 + 32 + 5

              = 110100101