Question

please answer this question with step by step explanation ​

Answer 1

Answer:

0.39

Step-by-step explanation:

21/51*?=28/17

21/51*17/18=?

357/918=?

119/306=?

=0.39

Answer 2

Answer:

$\frac{21}{51} \times ? = \frac{28}{17} \\ \\ \frac{7}{17} \times x = \frac{28}{17} \\ \\ x = \frac{28}{7} \\ \\ x = 4$

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