Question

calcula en tu cuaderno
a) 1/2 de .......=15 b) 2/7 de ....=4
c) 2/3 de ..... =600 d)4/9 de ....=458

Answer 1

$a) \frac{1}{2}\ de .....= 15 \to \frac{1}{2}\ *x = 15 \\ \\ x= 15: \frac{1}{2} \\ \\ x= 30\to \frac{1}{2}\ de \ \boxed{30}= 15 \\ \\ \\ b) \frac{2}{7}\ de .....= 4 \to \frac{2}{7}\ *x = 4\\ \\ x= 4: \frac{2}{7} \\ \\ x= 14\to \frac{2}{7}\ de \ \boxed{14}= 4$

$c) \frac{2}{3}\ de .....=600 \to \frac{2}{3}\ *x =600 \\ \\ x=600: \frac{2}{3} \\ \\ x= 900\to \frac{2}{3}\ de \ \boxed{900}= 600 \\ \\ \\ d) \frac{4}{9}\ de .....= 458\to \frac{4}{9}\ *x = 458 \\ \\ x= 458: \frac{4}{9} \\ \\ x= \frac{2061}{2}\to \frac{4}{9}\ de \ \boxed{ \frac{2061}{2}}= 458$

Espero que te sirva, salu2!!!!