## Prealgebra (7th Edition)

$-\frac{3x}{5}$
To write a fraction in simplest terms divide the numerator and denominator by the greatest common factor. $42x=\underline2\times3\times\underline7$ $70=\underline2\times5\times\underline7$ $GCF=2\times7=14$ $-\frac{42x}{70}=-\frac{42x\div14}{70\div14}=-\frac{3x}{5}$