Add 21/45 and 20/49
21/45 + 20/49 is 643/735.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 49 is 2205
Next, find the equivalent fraction of both fractional numbers with denominator 2205 - For the 1st fraction, since 45 × 49 = 2205,
21/45 = 21 × 49/45 × 49 = 1029/2205 - Likewise, for the 2nd fraction, since 49 × 45 = 2205,
20/49 = 20 × 45/49 × 45 = 900/2205 - Add the two like fractions:
1029/2205 + 900/2205 = 1029 + 900/2205 = 1929/2205 - 1929/2205 simplified gives 643/735
- So, 21/45 + 20/49 = 643/735
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