Question

joe has $200. he gives 1/10 of it to flo. he gives 4/10 of it to zoe. he keeps the rest. how much does each person get

Answer 1

1/10 of 200 is 20 ($\frac{1*200}{10} =20$), flo gets 20

 4/10 of 200 is 80 ($\frac{4*200}{10} = \frac{800}{10}=80$), Zoe gets 80.

And he gets the rest: 200 - 20 -80 =100: so he gets 100.