How can 4/5 be expressed as a percent?

To express the fraction 4/5 as a percent, you first convert the fraction to a decimal. This is done by dividing the numerator (4) by the denominator (5), which gives you 0.8.

Next, to convert a decimal to a percent, you multiply it by 100. So, 0.8 multiplied by 100 equals 80%.

The concept of converting a fraction to a percent is important in understanding how ratios and proportions work in mathematics. In this case, 4 parts out of 5 can be interpreted as 80 out of 100 parts, which is precisely the percentage representation of the fraction.

Therefore, expressing 4/5 as a percent results in 80%, making that option the correct choice.