Cut the salary into 6 equal units (sixths). Wife takes $$\frac{2}{3}$$ = 4 units, parents take $$\frac{1}{6}$$ = 1 unit, leaving 1 unit.<br><br>[[model:questions/solutions/q5262.png]]<br><br>• 6 units → $1950<br>• 1 unit → $1950 ÷ 6 = $325<br>• Left → 1 unit = $325<br><br>He has $325 left.<br>Check: wife $1300 + parents $325 + left $325 = $1950. ✓