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能简算的要简算 3/4 / 7/8 / 15/14= (4/9+2/15) / 2/15= 3/20 / 0.2 * 2

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能简算的要简算 3/4 / 7/8 / 15/14= (4/9+2/15) / 2/15= 3/20 / 0.2 * 2/3= [(2-0.6)* 8/7]/ 4/9=
3/4 / 7/8 / 15/14
=3/4 *8/7 / 15/14
=3/4 *8/7 *14/15
=4/5
(4/9+2/15) / 2/15
= (4/9+2/15) *15/2
= 4/9*15/2+2/15 *15/2
=10/3 +1
=13/3
3/20 / 0.2 * 2/3
= 3/20 *5 * 2/3
=1/2
[(2-0.6)* 8/7]/ 4/9
= [(2-0.6)* 8/7] *9/4
= (2-3/5)* 18/7
= 7/5* 18/7
=18/5