Add 21/60 and 15/7
1st number: 21/60, 2nd number: 2 1/7
21/60 + 15/7 is 349/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
15/7 = 15 × 60/7 × 60 = 900/420 - Add the two like fractions:
147/420 + 900/420 = 147 + 900/420 = 1047/420 - 1047/420 simplified gives 349/140
- So, 21/60 + 15/7 = 349/140
In mixed form: 269/140
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