What is 1/7 multiplied by 2/4 divided by 2/9 added by 5/6 subtracted by 3/5?

I read that as:

(1/7)(2/4)รท(2/9) + 5/6 - 3/5

= (1/7)(1/2)(9/2) + 25/30 - 18/30
= 9/28 + 7/30
= 135/420 + 98/420
= 233/420