Расчет дроби 4(5/22) x 2(20/21) = 961/77

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4
5
22
x
2
20
21
=
961
77
12.481
Solution:
4
5
22
x
2
20
21
=
4*22+5
22
x
2*21+20
21
=
88+5
22
x
42+20
21
=
93
22
x
62
21
=
93*62
22*21
=
5766
462
=
961*6
77*6
=
961
77
12.481
Detailed explanation of the solution:
1.Conversion of mixed fractions to ordinary fractions
4
5
22
x
2
20
21
=
4*22+5
22
x
2*21+20
21
=
88+5
22
x
42+20
21
=
93
22
x
62
21
2.Multiplication fractions
93
22
x
62
21
=
93*62
22*21
=
5766
462
3.Reduce the fraction and get the result
5766
462
=
961*6
77*6
=
961
77
12.481
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