3/5:(9/10-3/5x8/9)=?

Question

3/5:(9/10-3/5x8/9)=?

Comments

2/3

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1) 3/5*8/9=8/152)9/10-8/15=11/303)3/5:11/30=3/5*30/11=3*6/11=2/11

Answer 1

3/5:(9/10-3/5x8/9)=18/43
1) 3/5x8/9=8/15
2)9/10-8/15=1 13/30
3)3/5:1 13/30=18/43