Add 63/70 and 21/20
1st number: 63/70, 2nd number: 1 1/20
63/70 + 21/20 is 39/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
63/70 = 63 × 2/70 × 2 = 126/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Add the two like fractions:
126/140 + 147/140 = 126 + 147/140 = 273/140 - 273/140 simplified gives 39/20
- So, 63/70 + 21/20 = 39/20
In mixed form: 119/20
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