The sparkling house cleaning company has cleaned 28 houses this week. if this number represents 40% of the total number of houses the company is contracted to clean, how many total houses will the company clean by the end of the week

70 houses

Step-by-step explanation:

40×2=80

If you multiply the 40% by 2 you get 80%

Multiply the 28 by 2 to get your 80% for houses

28×2= 56

56 houses=80%

You need 20% to get your 100%, but at the beginning you were only given 40%. Divide your 40% (28) by 2 to get your 20% and add that to 56

28÷2=14

14+56=70

i believe the correct answer is b.