Andy had \( {4 \over 5}{}{}\)as many marbles as Tom. Andy then gave \( {5\over 8}{}{}\)of his marbles to Tom. Tom then had 204 more marbles than Andy. How many marbles did Andy have at first?

Now

1.5T=0.3T+204

1.2T=204

T=170

A=0.8*T = 0.8*170 = 136