Note that \(\dfrac13 = 0.333\dots\) and \(\dfrac23 = 0.666\dots\).
Then \(\dfrac1{300} = 0.00333\dots\) and \(\dfrac1{150} = 0.00666\dots\).
\(0.72666\dots + 0.02333\dots = 0.72 + 0.02 + 0.00666\dots + 0.00333\dots = 0.74 + \dfrac1{300} + \dfrac1{150}\)
I believe you can continue here.