Add 25/21 and 90/80
1st number: 1 4/21, 2nd number: 1 10/80
25/21 + 90/80 is 389/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
25/21 = 25 × 80/21 × 80 = 2000/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
90/80 = 90 × 21/80 × 21 = 1890/1680 - Add the two like fractions:
2000/1680 + 1890/1680 = 2000 + 1890/1680 = 3890/1680 - 3890/1680 simplified gives 389/168
- So, 25/21 + 90/80 = 389/168
In mixed form: 253/168
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