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.
The expenditure for public school student transportation was $914 per student transported in 201213 (in unadjusted dollars), and 55 percent of students were transported at public expense in 200708. SOURCE: U.S. Department of Education, National Center for Education Statistics. (2016).