1.

70% of a number is equal to four-fifth of another number. If the difference between the two numbers is 100, what is the bigger number ?1). 7002). 7503). 8004). Cannot be determined

Answer»

Solution

Let the TWO numbers be X and Y.
So, 70%*X = 4/5*Y = 80%*Y
Therefore, 7X = 8Y

It ALSO given that X-Y =100.
Hence, 7X-7Y = 700. But 7X=8Y

Therefore, 8Y-7Y = 700 or Y=700
Hence, the bigger number equals Y+100 = 800



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