- Divide the number by the new base (7 in this case) to give a quotient (result) and remainder.
- Note the remainder
- Make the number the quotient
- If the quotient is not zero repeat from step 1
- Write the remainders in reverse order (last found first)
That's
how I write a decimal number in any other base.
This is me doing it for 2365 in to base 7:
2365 ÷ 7 = 337 r 6
337 ÷ 7 = 48 r 1
48 ÷ 7 = 6 r 6
6 ÷ 7 = 0 r 6
⇒ 2365
10 = 6616
7