Let n = the number of I's needed to equal one U. Then nI = U Substitute 4A for I and substitute 8A for U n(4A) = 8A Solve for n: Simplifying: 4nA = 8A Divide both sides by 4ASo we need 2 I's to equal one U. Edwin
8A = U
2(4A) = U
2I = U ----- Substituting I for 4A