En una encuesta hecha a 1200 madres con hijos menores de 18 años, 450 trabajan fuera de casa. ¿que porcentaje de las encuestadas representan madres que no trabajan fuera de casa?

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.

Solution: x2+4x=276x=27,x=9/2answer: no