Add 70/45 and 21/63
1st number: 1 25/45, 2nd number: 21/63
70/45 + 21/63 is 17/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
70/45 = 70 × 7/45 × 7 = 490/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
21/63 = 21 × 5/63 × 5 = 105/315 - Add the two like fractions:
490/315 + 105/315 = 490 + 105/315 = 595/315 - 595/315 simplified gives 17/9
- So, 70/45 + 21/63 = 17/9
In mixed form: 18/9
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