Question

q.1 Mum had a bottle of oil.She used 2/5 of the bottle of oil last month and 1/4 of the bottle of oil this month.How much of the bottle of oil did she use altogether?
(with step plz thx 33)

Answer 1

oil used last month - 2/5

oil used this month - 1/4

total amount of oil used - 2/5 + 1/4

lcm of 5 and 4 = 20

--> 8/20 + 5/20

-->13/20

hence, 13/20 of oil was used in total...

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Answer 2

Answer:

let total oil be x

Step-by-step explanation:

x- 2x/5- x/4

20x/20 -8x/20- 5x/20

20x-8x-5x/20

20x-13x/20

7x/20

oil left in the bottle=7x/20

oil used=x- 7x/20= 20x-7x/29= 13x/20