Solution
Let the number be $$100x$$
According to ques, => $$100x + 42 = \frac{121}{100} \times 100x$$
=> $$100x + 42 = 121x$$
=> $$121x - 100x = 42$$
=> $$x = \frac{42}{21} = 2$$
$$\therefore$$ Number = $$100 \times 2 = 200$$
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