177k views
11 votes
What is -7/15 - -7/9? Show your work

1 Answer

4 votes

Answer:0.3111111111111 is the answer

Step-by-step explanation:

ind the least common denominator or LCM of the two denominators:

LCM of 15 and 9 is 45

Next, find the equivalent fraction of both fractional numbers with denominator 45

For the 1st fraction, since 15 × 3 = 45,

7

15

=

7 × 3

15 × 3

=

21

45

Likewise, for the 2nd fraction, since 9 × 5 = 45,

7

9

=

7 × 5

9 × 5

=

35

45

Add the two like fractions:

21

45

+

35

45

=

21 + 35

45

=

56

45

So, 7/15 + 7/9 = 56/45

In mixed form: 1

11

45

User SmallChess
by
7.4k points