Subtract 90/20 and 83/81

90
20
-
83
81
=
3
77
162

What is 90/20 - 83/81

90
20
-
83
81
=

In order to make fractions have the same denominator, multiply the numerator and denominator of each fraction by the denominator of the other

90 x 81
20 x 81
-
83 x 20
81 x 20
=
7290
1620
-
1660
1620
=
7290 - 1660
1620
=
5630
1620

OR

(90 x 81) - (83 x 20)
20 x 81
=
5630
1620

Simplify the fraction

Divide each part of the fraction with the greatest common factor to simplify the fraction

5630
1620
=
5630 ÷ 10
1620 ÷ 10
=
563
162

Because the numerator greater than the denominator, so we have an improper fraction, which means we can simplify it by converting the improper fraction to a mixed number.

Improper fraction to mixed number, get the whole number by dividing the numerator with the denominator, then subtract the numerator by the whole number multiplied by the denominator.

563
162
=
563 ÷ 162 = 3 +
563 - (3 x 162)
162
=
3
77
162

Fraction Calculator

📌 Negative signs in fractions

Positive Fractions

-1
-2
=
-
1
-2
=
-
-1
2
=
1
2

Negative Fractions

-1
2
=
1
-2
=
-
-1
-2
=
-
1
2