Sally eats lunch at a restaurant and her bill is \( \$ 12 \). She would like to leave a \( 15 \% \) tip for the waiter. How much money should she leave? \( \$ \)

To calculate the tip, Sally needs to find \( 15\% \) of her \( \$ 12 \) bill. To do this, multiply \( 12 \) by \( 0.15 \) (the decimal form of \( 15\% \)). So, \( 12 \times 0.15 = 1.80 \). Therefore, she should leave a tip of \( \$ 1.80 \). When dining out, tipping etiquette can vary widely; some diners might round up to the nearest dollar or even add a bit more for excellent service. So, if the service was particularly noteworthy, Sally might consider leaving a tip of \( \$ 2 \) instead!