If you specify a negative scale, Oracle Database rounds the actual data to the specified number of places to the left of the decimal point. For example, specifying (7,-2) means Oracle Database rounds to the nearest hundredths, as shown in Table 26-1.
McCann (2000) found that households in communities with good transit use save an average of about $3,000 annually on transportation costs. Litman (2004) found annual transportation cost savings of about $1,300 per household in cities with well-established rail transit systems compared with cities that lack rail.
At a cost of $7,677, transportation is the 2 nd largest category for the average family budget. While spending on gas each month tends to be painful, it is not actually the largest cost of owning a vehicle. According to the BLS, the average family spends $2,715 on gasoline.