Add 54/70 and 21/20
1st number: 54/70, 2nd number: 1 1/20
54/70 + 21/20 is 51/28.
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,
54/70 = 54 × 2/70 × 2 = 108/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Add the two like fractions:
108/140 + 147/140 = 108 + 147/140 = 255/140 - 255/140 simplified gives 51/28
- So, 54/70 + 21/20 = 51/28
In mixed form: 123/28
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