Look at the equations for the two reactions:

Reaction 1 CuCO₃(s) + 2HCl(aq) ⇒ CuCl₂(aq) + H₂O(l) + CO₂(g)
Reaction 2 CuO(s) + 2HCl(aq) ⇒ CuCl₂(aq) + H₂O(l)

Calculate the percentage atom economy for Reaction 2.