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6 September, 18:06

What is three fourths plus four fifths minus seven tenths

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  1. 6 September, 21:44
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    17/20

    Step-by-step explanation:

    3/4 + 4/5 - 7/10

    1. Find the LCD (Least Common Denominator). The LCD is 20.

    2. 20/4=5. 5*3=15. So, 3/4 becomes 15/20.

    3. 20/5=4. 4*4=16. So, 4/5 becomes 16/20.

    4. 20/10=2. 2*7=14. So, 7/10 becomes 14/20.

    5. Your new equation is 15/20 + 16/20 - 14/20.

    6. Solve from left to right.

    7. 15/20 + 16/20 = 31/20.

    8. 31/20 - 14/20 = 17/20.
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