Question

0,00000051= 0,0000017= a/b

Answer 1

$0.000 00051 = 0.0000017 = \frac{a}{b} \\ \\ 5.1 \times {10}^{ - 7} = 1.7 \times {10}^{ - 6} = \frac{a}{b}$

Answer 2

0,0000017 :"//)_)=/€)(