Multiplying 200 by 25% equals 50, and calculating that calves are 50 more than cows, and then adding 200 and 50 to the number of cows equals 250, which is the number of calves.

Mathematics is a subject that studies concepts such as quantity, structure, change and space with symbolic language. The discipline of explaining relationships (quantitative relationships, structural relationships, and changes before and after) with the help of language.