Add 72/60 and 21/7
1st number: 1 12/60, 2nd number: 3 0/7
72/60 + 21/7 is 21/5.
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,
72/60 = 72 × 7/60 × 7 = 504/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
21/7 = 21 × 60/7 × 60 = 1260/420 - Add the two like fractions:
504/420 + 1260/420 = 504 + 1260/420 = 1764/420 - 1764/420 simplified gives 21/5
- So, 72/60 + 21/7 = 21/5
In mixed form: 41/5
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