Hi there,

Following pls find the worked solution and explanation:

25% = (1/4)

This volume of water is poured into bottle (B ).

Jug(J) : B

2 : 1

Since capacity of J is 2x that of J, we have ...

Vol of water in B = (1/4) x 2= (1/2) = **50%**

Alternatively, can also use <Model> method as shown:

** - buffer space for alignment purpose

**<-------- 2p ------------>

J |-------------|-------------|

B |-------------|

**<--- 1p --->

Given that (1/4) of J is filled with water, we have 2p of J divided into 4 equal units (u). Likewise, the 1p of B is also divided into 2u.

**<W->

J |------|------|------|------|

B |------|------|

Since that 1u of W from J is poured into B, it would fill up the same 1u in B. From the model in B, fraction of B filled up with W is (1/2) = **50%**.

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Trust this helps.

Do let me know again should there be any clarification.

Cheers,

Edward.