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How can I calculate 451/ 586 on the CAT exam where time management is critical?
Calculating 451/586 on the CAT exam where time management is critical, is quite simple, and does not take much time. It is roughly 450/600=3/4.
Now, reducing 600 to 586 results in a slightly higher ratio, such as 0.78. Examine options that are a multiple of and slightly higher than 3/4=6/8=9/12=12/16=15/20. Discard options 15/18 & 5/8 in this manner. Always use approximation when calculating such small sums.
In the preceding example, you get 45/59 by rounding them to two digits. It's now fairly simple to calculate. In CAT, a virtual calculator is available at the top of the computer screen for performing such calculations.
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Yes, approximation is the most important thing here. Try to round off the numbers in the multiples of 10s. For eg. 451 becomes 450 and 586 becomes 600.
Now it will be easier to calculate: 450/600 = 45/60 = 9/12 = 3/4
3/4 is 0.75. So your answer should be close to this value.
In case of fractions, look for values closer to 3/4 or if they are given in decimals, look for options closer to 0.75.
Therefore, 451/586 = 0.769.
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