Question

Calcular el 30% del 20% del 60% de una cantidad cuyo 36% es equivalente al 50% del 72% de 2500 a)1500 b)450 c)900 d)1800 e)750

Answer 1

30%*20%*60%X=? ...(1)
36%X=50%*72%*2500 ...(2)
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de (2) resolvemos:
36%X=50%*72%*2500 

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ahora calculamos en (1)
30%*20%*60%X=

espero te sirva :)