Add 20/7 and 30/45
1st number: 2 6/7, 2nd number: 30/45
20/7 + 30/45 is 74/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
20/7 = 20 × 45/7 × 45 = 900/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
30/45 = 30 × 7/45 × 7 = 210/315 - Add the two like fractions:
900/315 + 210/315 = 900 + 210/315 = 1110/315 - 1110/315 simplified gives 74/21
- So, 20/7 + 30/45 = 74/21
In mixed form: 311/21
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