* Move the decimal point to the right until you have a number between 1 and 10. In this case, we move the decimal one place to the right, giving us 7.7.
* Count how many places you moved the decimal. We moved it one place to the right.
* If you moved the decimal to the right, the exponent of 10 will be negative. If you moved it to the left, the exponent would be positive.
* Write the number in the form a x 10^b, where 'a' is the number between 1 and 10, and 'b' is the exponent.
Therefore, 0.77 in scientific notation is 7.7 x 10^-1.
