Add 42/49 and 21/45
42/49 + 21/45 is 139/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 45 is 2205
Next, find the equivalent fraction of both fractional numbers with denominator 2205 - For the 1st fraction, since 49 × 45 = 2205,
42/49 = 42 × 45/49 × 45 = 1890/2205 - Likewise, for the 2nd fraction, since 45 × 49 = 2205,
21/45 = 21 × 49/45 × 49 = 1029/2205 - Add the two like fractions:
1890/2205 + 1029/2205 = 1890 + 1029/2205 = 2919/2205 - 2919/2205 simplified gives 139/105
- So, 42/49 + 21/45 = 139/105
In mixed form: 134/105
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