Question

Simplify
a.) [1/3-1/4+1/5-1/6] ÷ [2/5-5/9+3/5-7/18]
b.) [13/21÷39/42] × 3÷-5

Please give me full answer with explanation not other answer. If you will give right answer I'll mark you as Brainliest and rate you with 5 stars. ​

Answer 1

Answer:

21/118=0.1779

10

is the correct answer