Add 70/40 and 27/21
1st number: 1 30/40, 2nd number: 1 6/21
70/40 + 27/21 is 85/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
70/40 = 70 × 21/40 × 21 = 1470/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
27/21 = 27 × 40/21 × 40 = 1080/840 - Add the two like fractions:
1470/840 + 1080/840 = 1470 + 1080/840 = 2550/840 - 2550/840 simplified gives 85/28
- So, 70/40 + 27/21 = 85/28
In mixed form: 31/28
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