Add 28/21 and 70/60
1st number: 1 7/21, 2nd number: 1 10/60
28/21 + 70/60 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
28/21 = 28 × 20/21 × 20 = 560/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
70/60 = 70 × 7/60 × 7 = 490/420 - Add the two like fractions:
560/420 + 490/420 = 560 + 490/420 = 1050/420 - 1050/420 simplified gives 5/2
- So, 28/21 + 70/60 = 5/2
In mixed form: 21/2
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