Examples Work out the upper bound and lower bound for the following measurements. 32 cm, measured to the nearest cm: The degree of accuracy is to the nearest 1 cm. 1 cm ÷ 2 = 0.5 cm ...

The top 20% of earners are in the upper class. However, the Survey of Consumer Finances breaks this group down even further into those in the 80th to 90th and the 90th to 100th income percentiles.

In 1970, the middle class held 62% of America's aggregate household income and the upper class held 29% — in 2014, the middle class held 43%, while the upper class held 49%.

On the flip side, New York, Louisiana, Massachusetts, and Washington, DC, all had below 44% of households in the middle class, meaning that more residents fell into either the upper or lower classes.

Examples Work out the upper bound and lower bound for the following measurements. 32 cm, measured to the nearest cm: The degree of accuracy is to the nearest 1 cm. 1 cm ÷ 2 = 0.5 cm ...