It is: 3/10-1/4 = 1/20
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To subtract fractions, you need to find a common denominator. The common denominator for 10 and 4 is 20. So, rewriting the fractions with a denominator of 20, we get 6/20 - 5/20 which equals 1/20.
1/3 − 3/10 = 1/30
1/2 = 5/10 so then 5/10 - 3/10 = 2/10 = 1/5
1/10
1 whole and 1 over 10
4/5 - 3/10 = 8/10 - 3/10 = 5/10 = 1/2