Honda sold 112 cars this month. If that is 40% more than last month, how many were sold last month?

112 is 40% more than the previous month's sales. Let x be the previous month's sales. x+0.4x=112 (previous month's sales + 40% previous month's sales = this month's sales).

x+0.4x=1.4x=112. divide both sides by 1.4 and x=80.