Question

Helen has 21 marbles. Helen gives jess 2/3 of her marbles. Helen also loses 3/7 of the rest of them. How many does Helen have left?

Answer 1

Answer:

No of marbles Helen had=21

No of marbles she gave Jess=14

No of marbles she lost =3

No of marbles she has left = 21-(14+3)=21-17=4

Step-by-step explanation:

Subtraction and convertion of fracton inyo numbers is key

Answer 2

Answer:

Here is the answer hope it helps, But please be sure to recheck the answer

Step-by-step explanation

Total marbles - 21

Marbles given or lost = 2/3 and 3/7

Overall marbles given

2 /3

+

3 /7

= (Taking L.C.M as 21)  

14 /21

+

9 /21

=

14+9 /21

=

23 /21

Now marbles left = 21-23/21

21−

23 /21

=

21 /1

−

23 /21

= Taking lcm as 21

 441 /21

+

−23 /21

=

441+−23 /21

=

418 /21.

Marbles left = 418/21