Riley has 250 marbles in his collection. if 50 of them are red, what percent of them is red

Riley has 250 marbles in his collection. 50 of the marbles are red.

The fraction represents the 50 marbles that are red out of all the marbles. We can find out what percent of marbles are red by changing the fraction to a percent.

The fraction can be reduced to by dividing both the numerator and denominator by the greatest common factor of 50 and 250.

1 ÷ 5 = 0.2

0.2 × 100 = 20%

Therefore, 20% of the marbles are red.

the answer is d. 75%

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