this year cornell class took one more than three as many field trips as last years class this year cornells class took a total of 7 trips . how many field trips did his class take last years

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.