Add 45/21 and 90/54
1st number: 2 3/21, 2nd number: 1 36/54
45/21 + 90/54 is 80/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
45/21 = 45 × 18/21 × 18 = 810/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
90/54 = 90 × 7/54 × 7 = 630/378 - Add the two like fractions:
810/378 + 630/378 = 810 + 630/378 = 1440/378 - 1440/378 simplified gives 80/21
- So, 45/21 + 90/54 = 80/21
In mixed form: 317/21
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