Father is 9 equal units = 171 cm. May is $$\frac{7}{9}$$ of her father, so 7 of those units.<br><br>[[model:questions/solutions/q3432.png]]<br><br>• Father = 9 units → 171 cm<br>• 1 unit → 171 ÷ 9 = 19 cm<br>• May = 7 units → 7 × 19 = 133 cm<br><br>May’s height is 133 cm.<br>Check: $$\frac{7}{9}$$ of 171 = 133 cm. ✓