Question

Use a common denominator to find negative 2/3 plus negative 4/5

Answer 1

-10/15 + -12/15 = -1 6/15. -2/3 becomes -10/15 when multiplied by 5. -4/5 becomes -12/15 when multiplied by 3.

Answer 2

answer:

$\frac{22}{15}$ or 1 $\frac{7}{15}$

step-by-step explanation:

a common denominator between 3 and 5 is 15

first to get our denominator in the fraction $\frac{2}{3}$ to 15 we need to multiply by 5 so 2 × 5 = 10 and 3 × 5 = 15

this makes our new fraction $\frac{10}{15}$

now we need to get our denominator in the fraction $\frac{4}{5}$ to 15 so we need to multiply by 3 so 4 × 3 = 12 and 5 × 3 = 12

this makes our new fraction $\frac{12}{15}$

our new equation with common denominators is now $\frac{10}{15}$ + $\frac{12}{15}$ = coming out to be $\frac{22}{15}$

to make this into a mixed fraction we know 22 only goes into 15 once with 7 left over so our mixed fraction is 1 $\frac{7}{15}$