The following fraction has a repeating decimal equivalent form. Express the decimal and percent equivalent form in the repeating decimal notation. Show just the minimum number of decimal places needed to display the repeating digit or group of digits.
$-\frac{7}{270}$

Repeating Decimal

A decimal fraction in which a sequence of digits repeats indefinitely.

Decimal Notation

A method of writing numbers that uses a decimal point to separate the whole number from fractions of a whole.

Percent Equivalent

The decimal or fractional representation of a percent, illustrating the proportion of a whole.