Add 21/54 and 70/45
1st number: 21/54, 2nd number: 1 25/45
21/54 + 70/45 is 35/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 45 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Likewise, for the 2nd fraction, since 45 × 6 = 270,
70/45 = 70 × 6/45 × 6 = 420/270 - Add the two like fractions:
105/270 + 420/270 = 105 + 420/270 = 525/270 - 525/270 simplified gives 35/18
- So, 21/54 + 70/45 = 35/18
In mixed form: 117/18
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