Add 81/60 and 45/70
1st number: 1 21/60, 2nd number: 45/70
81/60 + 45/70 is 279/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
81/60 = 81 × 7/60 × 7 = 567/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
45/70 = 45 × 6/70 × 6 = 270/420 - Add the two like fractions:
567/420 + 270/420 = 567 + 270/420 = 837/420 - 837/420 simplified gives 279/140
- So, 81/60 + 45/70 = 279/140
In mixed form: 1139/140
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