Multiplying negative and positive fractions

I find that converting fractions into decimals sometimes helps. So:  -4/5 = -0.8 and  9/5 = 1.8

Answer: -0.8 * 1.8 = -1.44 or  36/25

Hope I could help!  ^-^

$-\frac{4}{5}\times \frac{9}{5}\\ =-\frac{4\times 9}{5\times5}\\ = -\frac{36}{25}$