## Elementary Algebra

$0.0156$
The product of a negative real number and a negative real number is a positive real number. We convert the decimal into a fraction for the ease of simplification: $(-0.12)(-0.13)$ =$-\frac{12}{100}\times-\frac{13}{100}$ =$\frac{-12\times-13}{100\times100}$ =$\frac{156}{10000}$ =$0.0156$