Add 21/35 and 20/45
21/35 + 20/45 is 47/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 35 × 9 = 315,
21/35 = 21 × 9/35 × 9 = 189/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
20/45 = 20 × 7/45 × 7 = 140/315 - Add the two like fractions:
189/315 + 140/315 = 189 + 140/315 = 329/315 - 329/315 simplified gives 47/45
- So, 21/35 + 20/45 = 47/45
In mixed form: 12/45
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