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Aptitude Day 107

Ratio and Proportion:

The least whole number which when subtracted from both the terms of the ratio 9:8 gives a ratio less than 11:20 is:

Solution:
               (9-x)/(8-x) <11/20
               180-20x < 88-11x
               92 < 9x
               x > 10.2

               Least such whole number is 10.

A problem to solve:

If 0.32 of a number is equal to 0.64 of another number, the ratio of the numbers is:

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