A simple method of 6 / 7 - (4 / 5-1 / 7) stripping There is a simple way to write No easy way, no easy way

A simple method of 6 / 7 - (4 / 5-1 / 7) stripping There is a simple way to write No easy way, no easy way


6 out of 7 - (4 out of 5-1 out of 7)
=6/7+1/7-4/5
=1-4/5
=1/5