林叔叔有4盒水果，分别是盒子A、盒子B、盒子C和盒子D。下方的条形图显示了每个盒子中水果的数量。代表盒子D的条形未显示。

1. Read the number of fruits in Box A and Box B from the bar graph

From the graph:
Number of fruits in Box A = $60$
Number of fruits in Box B = $100$

2. Calculate the difference in the number of fruits between Box B and Box A

Difference = $100 - 60 = 40$

3. Calculate the percentage increase relative to Box A

Percentage more = $\frac{40}{60} \times 100\%$
$= \frac{2}{3} \times 100\%$
$= \frac{200}{3}\%$
$= 66\frac{2}{3}\%$

1. Determine the total number of fruits in Box C from the bar graph

From the bar graph, the number of fruits in Box C is $80$.

2. Calculate the number of apples using the sum and difference method

Let the number of oranges be $1$ unit.
The number of apples is $1$ unit $+ 4$.
Total fruits $= 2$ units $+ 4 = 80$
$2$ units $= 80 - 4 = 76$
$1$ unit $= 76 \div 2 = 38$ (oranges)
Number of apples $= 38 + 4 = 42$

Alternatively, using sum and difference:
Number of apples $= (80 + 4) \div 2 = 42$

1. Find the total number of fruits in all 4 boxes

$\text{Total fruits} = 90 \times 4 = 360$

2. Find the total number of fruits in Boxes A, B, and C from the graph

$\text{Fruits in A, B, C} = 60 + 100 + 80 = 240$

3. Calculate the number of fruits in Box D

$\text{Fruits in Box D} = 360 - 240 = 120$