What approximate value should come in place of the question mark (?) in the following equation ?
$$695.95\div 29.07 \times ? + 40.25 = 399.99$$
Let the number to replace the question mark be equal to $$X$$
Hence, $$695.95\div 29.07 \times X + 40.25 = 399.99$$
$$399.99 \approx 400$$ and $$695.95 \approx 696$$ and $$29.07 \approx 29$$
So, the expression looks like $$696 \div 29 \times X + 40 = 400$$
Hence, $$24 \times X = 360$$ or $$X = 15$$
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