23/30+2/45=? 27/75+0,32-7/15=? (1/3-1/4)-(1/5-1/6)=?

Question

23/30+2/45=?
27/75+0,32-7/15=?
(1/3-1/4)-(1/5-1/6)=?

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Answer 1

23/30+2/45=69\90+4\90=73\90
27/75+0,32-7/15=27\75+32\100-7\15=27\75+8\25-7\15=27\75+24\75-35\75=16\75
(1/3-1/4)-(1/5-1/6)=(20\60-15\60)-(12\60-10\60)=5\60-2\60=3\60=1\20

Answer 2

23/30+2/45=0,811
27/75+0,32-7/15=0,2134
(1/3-1/4)-(1/5-1/6)=-1,2