Add 9/45 and 3/21
9/45 + 3/21 is 12/35.
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,
9/45 = 9 × 7/45 × 7 = 63/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
3/21 = 3 × 15/21 × 15 = 45/315 - Add the two like fractions:
63/315 + 45/315 = 63 + 45/315 = 108/315 - 108/315 simplified gives 12/35
- So, 9/45 + 3/21 = 12/35
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