How to solve 2/7-1/21
Answers
Step-by-step explanation:
2
7
−
1
21
−
2
7
as a fraction with a common denominator, multiply by
3
3
.
−
2
7
⋅
3
3
−
1
21
Write each expression with a common denominator of
21
, by multiplying each by an appropriate factor of
1
.
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Multiply
2
7
and
3
3
.
−
2
⋅
3
7
⋅
3
−
1
21
Multiply
7
by
3
.
−
2
⋅
3
21
−
1
21
Combine the numerators over the common denominator.
−
2
⋅
3
−
1
21
Simplify the numerator.
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−
7
21
Cancel the common factor of
−
7
and
21
.
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−
1
3
Move the negative in front of the fraction.
−
1
3
The result can be shown in multiple forms.
Exact Form:
−
1
3
Decimal Form:
-0.3
Step-by-step explanation:
=2/7-1/21
TAKING THE LCM OF DENOMINATOR
=6-1/21
(LCM OF THE DENOMINATOR IS 21 ANDWE
WILL DIVIDE THE 1ST DENOMINATOR AND 2ND
DENOMINATOR BY LCM.AND THE ANSWER
THAT WILL COME WE WILL JUST MULTIPLY
WITH THE 1ST NUMERATOR AND SECOND
NUMERATOR .
=5/21