Question

Explain how mental math can be used to estimate a 15% tip on a taxi ride that costs $23.25

Answer 1

Answer: 3.4875

Step-by-step explanation:

Here, According to the question,

Total amount is $23.25

$100\% = 23.25$

⇒$1\% = \frac{23.25}{100}$

⇒$1\%= \frac{0.95}{8}$

⇒ $15\%= 15\times \frac{0.95}{8}$ ( By multiplying 15 on both sides)

⇒ $15\%= \frac{14.25}{8}$

⇒  $15\%= 3.4875$

Thus, 15% of $23.25 is $3.4875

Answer 2

10%=2.33 + half that is 1.17= 3.50 23.25×.15= 3.4875