Answer:
[tex]{ \tt{0.00080 = 0.8 \times {10}^{ - 3} }} \\ \\ = { \tt{8 \times {10}^{ - 4} }} \\ \\ = { \tt{8 \times \frac{1}{10000} }} \\ \\ = { \tt{ \frac{1}{1250} }}[/tex]
