krissh

This equals \(\frac{2}{3}\)and it is impossible to obtain its standard form(I call it scientific notation because that's what the teachers said in my school)

Hi max :)   your teacher is right.

But 2/3 can be written on scientific notation.

2/3

= 0.666666..

= 6.66666... ×10^(-1)

I have not disayed the repeater notation properly because I am on my phone. :(