Add 72/60 and 1/21
1st number: 1 12/60, 2nd number: 1/21
72/60 + 1/21 is 131/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
72/60 = 72 × 7/60 × 7 = 504/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
1/21 = 1 × 20/21 × 20 = 20/420 - Add the two like fractions:
504/420 + 20/420 = 504 + 20/420 = 524/420 - 524/420 simplified gives 131/105
- So, 72/60 + 1/21 = 131/105
In mixed form: 126/105
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