Mrs Chang knows knows that she spends $180 for groceries each week for her family. If this is 12% of the family's total income for the week, how much do they earn each week?

Set up a percent equation and solve

1 answer

Let x be the family's total income for the week.
We know that 12% of x is equal to $180.
So 12% of x is (12/100)x = 0.12x.
Therefore, 0.12x = $180.
To find x, divide both sides of the equation by 0.12: x = $180/0.12 = $1500.
Therefore, the family earns $1500 each week. Answer: \boxed{1500}.