## anonymous one year ago divide 2/5 / -3/10 A. http://static.k12.com/bank_packages/files/media/mathml_221b4a1c0e2637a4d179aec080db6ff3f8cab8fc_1.gif B. http://static.k12.com/bank_packages/files/media/mathml_a2543b3347056437e37b0e86a8b349c2fd5cb372_1.gif C. http://static.k12.com/bank_packages/files/media/mathml_3e5f9ad33dad60506d79b4c0d95d6f4efc9308c8_1.gif D. http://static.k12.com/bank_packages/files/media/mathml_98514a849d2c9628b4ab0c5009c94bbea25e03a1_1.gif

1. anonymous

Do you know it?

2. idku

$\frac{2}{5}\div \frac{-3}{10}~~\Longrightarrow~~\frac{2}{5}\times \frac{10}{-3}$

3. idku

you flip the fraction by which you divided, and instead of dividing by it, you multiply by it

4. idku

that works in any case, $\frac{A}{B}\div \frac{C}{D}~~=~~\frac{A}{B}\times\frac{D}{C}$

5. idku

can you proceed ?

6. anonymous

2/5/-3/10 = -1/75

7. anonymous

There is no implied grouping in this problem. The divisions are calculated from left to right.