Which of the following are reasonable ways to estimate 15% of $29.95. There may be more than one reasonable method. 10% of 30 is 3. 5% is half of that, so 1.5. Together, 15% is $4.5 30% is 3 out of 10, so that would be 9 out of 30. 15% is half of that, so $4.5 0.15 times 29.95 is $4.4925 15 times 30 is $450 15 times 30 is $450. Adjusting the decimal place gives $45