Question

how the three came in the solution in third line 1/-3​

Answer 1

Step-by-step explanation:

(15/243×(-27)/75)+(8/(-66)×(-22/40)

here 27×9=243

and 15×5=75

22×3=66 and 8×5=40

hence above is simplied as

(1/9×(-1)/5)+(1/(-3)×(-1)/5)

-1/45+1/15

taking lcm of denominators

-1/45+3/45

2/45