Lucia and Juan paint a 12.5 m2 wall, on Tuesday they painted 75/8 m2 and on Wednesday 3 m2, how many m2 do they have left to paint?

To find out how many square meters of the wall Lucia and Juan have left to paint, you need to subtract the areas they have already painted from the total area of the wall. Total wall area = 12.5 m² Area painted on Tuesday = 75/8 m² Area painted on Wednesday = 3 m² To find the total area painted so far: Total area painted = Area on Tuesday + Area on Wednesday Total area painted = (75/8) m² + 3 m² Now, add the areas together: Total area painted = (75/8) m² + 3 m² = (75/8 + 24/8) m² = (99/8) m² Now, subtract the total area painted from the total wall area to find out how many square meters they have left to paint: Area left to paint = Total wall area - Total area painted Area left to paint = 12.5 m² - (99/8) m² To subtract fractions, they need a common denominator. In this case, it's 8: Area left to paint = (12.5 * 8/8) m² - (99/8) m² Area left to paint = (100/8) m² - (99/8) m² Now, subtract: Area left to paint = (100/8 - 99/8) m² Area left to paint = (1/8) m² So, Lucia and Juan have 1/8 square meters left to paint on the wall.