Add 7/45 and 90/21
1st number: 7/45, 2nd number: 4 6/21
7/45 + 90/21 is 1399/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
7/45 = 7 × 7/45 × 7 = 49/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
90/21 = 90 × 15/21 × 15 = 1350/315 - Add the two like fractions:
49/315 + 1350/315 = 49 + 1350/315 = 1399/315 - So, 7/45 + 90/21 = 1399/315
In mixed form: 4139/315
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