Jose predicted that he would sell 48 umbrellas. He actually sold 72 umbrellas. What are the values of a and b in the table below? Round to the nearest tenth if necessary. Percent Error Item Approximate value Exact value Error Absolute error Ratio Percent error Umbrellas 48 72 Negative 24 24 a b a = StartFraction 24 over 72 EndFraction; b = 33.3 percent a = StartFraction 24 over 48 EndFraction; b = 50 percent a = StartFraction 48 over 72 EndFraction; b = 67.7 percent a = StartFraction 24 over 24 EndFraction; b = 100 percent