Add 21/9 and 70/60
1st number: 2 3/9, 2nd number: 1 10/60
21/9 + 70/60 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
21/9 = 21 × 20/9 × 20 = 420/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
70/60 = 70 × 3/60 × 3 = 210/180 - Add the two like fractions:
420/180 + 210/180 = 420 + 210/180 = 630/180 - 630/180 simplified gives 7/2
- So, 21/9 + 70/60 = 7/2
In mixed form: 31/2
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