Logarithmic functions

Loudness refers to how loud or soft a sound seems to a listener. The loudness $L$ of sound in decibels, ($\mathrm{dB}$) is determined by the formula $$L=10\log \left(\frac{I}{I_0}\right),$$ where $I$ is intensity of the sound waves (in watts per square meter, $\mathrm{W}/{\mathrm{m}}^2$) and ${\mathrm{I}}_0$ is fixed and determined intensity of the sound (${10}^{-12}\mathrm{W}/{\mathrm{m}}^2$) that can barely be perceived. $$$$ The intensity of the sound produced by the rock band is about $100$ times greater than the intensity of the sound emitted by conventional motor vehicles. How much greater (in $\mathrm{dB}$) is loudness of rock band than loudness of motor vehicles?