Add 21/45 and 18/7
1st number: 21/45, 2nd number: 2 4/7
21/45 + 18/7 is 319/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
21/45 = 21 × 7/45 × 7 = 147/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
18/7 = 18 × 45/7 × 45 = 810/315 - Add the two like fractions:
147/315 + 810/315 = 147 + 810/315 = 957/315 - 957/315 simplified gives 319/105
- So, 21/45 + 18/7 = 319/105
In mixed form: 34/105
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