Divide the number 285 by 2 repeatedly, recording the remainders, and then read the remainders from bottom to topHere : | Division | Quotient | Remainder | 285 ÷ 2 142 1 142 ÷ 2 71 0 71 ÷ 2 35 1 35 ÷ 2 17 1 17 ÷ 2 8 1 8 ÷ 2 4 0 4 ÷ 2 2 0 2 ÷ 2 1 0 1 ÷ 2 0 1 Read the remainders starting from the bottom100011101And that's it