Add 21/63 and 30/45
21/63 + 30/45 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
21/63 = 21 × 5/63 × 5 = 105/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
30/45 = 30 × 7/45 × 7 = 210/315 - Add the two like fractions:
105/315 + 210/315 = 105 + 210/315 = 315/315 - 315/315 simplified gives 1/1
- So, 21/63 + 30/45 = 1/1
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