Which correctly explains how to estimate 55 percent of 64?

Question

Round 55 percent to 40 percent and 64 to 60. Think of 40 percent as One-fourth. So, One-fourth of 60 is 15.
Round 55 percent to 60 percent and 64 to 70. Think of 60 percent as One-third. So, One-third of 70 is 23.3.
Round 55 percent to 50 percent and 64 to 70. Think of 50 percent as One-fifth. So, One-fifth of 60 is 12.
Round 55 percent to 50 percent and 64 to 60. Think of 50 percent as One-half. So, One-half of 60 is 30.

Answer 1

To estimate 55 percent of 64 using rounding, the most appropriate choice among the options provided is:

Round 55 percent to 50 percent and 64 to 60. Think of 50 percent as One-half. So, One-half of 60 is 30.

Here's the reasoning:

1. Rounding 55 percent: To estimate, you can round 55 percent to 50 percent, which is a simpler figure for mental calculations.
2. Rounding 64: You can round 64 to 60 for easier computation.
3. Calculating: 50 percent of 60 is calculated as follows:
   • 50 percent (or One-half) of 60 = 60/2 = 30.

Thus, this option accurately estimates 55 percent of 64.