SOLUTION: 12/20-8/30 I have to simplify

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Question 548253: 12/20-8/30 I have to simplify
Answer by Maths68(1474) About Me  (Show Source):
You can put this solution on YOUR website!
=12%2F20-8%2F30
=cross%2812%29%2Fcross%2820%29-cross%288%29%2Fcross%2830%29
=3%2F5-4%2F15
Take LCD
=%28%283%29%283%29-%284%29%281%29%29%2F15
=%289-4%29%2F15
=5%2F15
=cross%285%29%2Fcross%2815%29
=1%2F3