What approximate value should come in the place of the question mark '?' in the following question? 17.77% of 399.99 + 42.14% of 249.99 = ? – 15.99% of 199.98

Approximating the values gives the expression 18% of 400 plus 42% of 250 equals x minus 16% of 200. Calculating the percentages yields 72 + 105 = x - 32, which simplifies to 177 = x - 32. Solving for x gives x = 209.

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