In the pool, the length of the track is 200 m. The swimmer has already covered three fourths of this track.

In the pool, the length of the track is 200 m. The swimmer has already covered three fourths of this track. How many meters is left for him to swim?

The total length of the pool track along which the swimmer swims, according to the condition, is 200 meters.
It is also known that the swimmer has already swum 3/4 of the entire length of the track.
We see that the entire track was divided into 4 equal sections.
Let’s find how many metro stations make up one such section:
200: 4 = 50 (meters) – the length of one section of the entire track.
Method 1:
The swimmer has already swum 3 such sections, we will find how many meters the swimmer has swum:
3 * 50 = 150 (meters) – the swimmer has already swum.
Let’s find how many meters he has to swim:
200 – 150 = 50 (meters) – the swimmer has to swim.
Method 2:
In total, the swimmer has already swum 3/4 of the entire track. Since the total track is 4/4 parts, we will find how many parts the swimmer has left to swim:
4/4 – 3/4 = 1/4 (part) – it remains for the swimmer to swim.
1 part is 50 meters (found above).
Let’s find how many meters it remains for him to swim:
50 * 1 = 50 (meters) – left to swim.
Answer: 50 meters.