Question

el 30% del 15% de qué número es igual al 90% del 50% de 200?

Answer 1

$\frac{30}{100} * \frac{15}{100} *x= \frac{90}{100} * \frac{50}{100} *200 \\ \\ \frac{30*15}{100*100} *x=\frac{90*50}{100*100} *200 \\ \\ \frac{450}{10000} *x=\frac{4500}{10000} *200 \\ \\ \frac{450}{10000} *x=\frac{900000}{10000} \\ \\ \frac{45}{1000} *x=\frac{90}{1} \\ \\ \frac{45}{1000} *x=90 \\ \\ x=90:\frac{45}{1000} \\ \\ x=90*\frac{1000}{45} \\ \\ x=2000$

El número es 2.000.