Add 3/21 and 45/28
1st number: 3/21, 2nd number: 1 17/28
3/21 + 45/28 is 7/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
3/21 = 3 × 4/21 × 4 = 12/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
45/28 = 45 × 3/28 × 3 = 135/84 - Add the two like fractions:
12/84 + 135/84 = 12 + 135/84 = 147/84 - 147/84 simplified gives 7/4
- So, 3/21 + 45/28 = 7/4
In mixed form: 13/4
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