alex added 10g of salt to 90g of water what is the percentage of salt in this solution now

Question

 i need help with percenttage in math

Answer 1

To find the percentage of something in a mixture, take the mass of that something and divide by the total mass of the mixture (or solution as in this problem) then multiply the answer by 100.

 

mass of salt = 10g

mass of salt and water solution = 10g + 90g = 100g

percentage of salt in solution = 10g/100g x 100 = 0.1 x 100 = 10%

Answer 2

10g / 100g = ?