Add 1/21 and 18/45
1/21 + 18/45 is 47/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
1/21 = 1 × 15/21 × 15 = 15/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
18/45 = 18 × 7/45 × 7 = 126/315 - Add the two like fractions:
15/315 + 126/315 = 15 + 126/315 = 141/315 - 141/315 simplified gives 47/105
- So, 1/21 + 18/45 = 47/105
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