Add 72/21 and 40/10
1st number: 3 9/21, 2nd number: 4 0/10
72/21 + 40/10 is 52/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
72/21 = 72 × 10/21 × 10 = 720/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
40/10 = 40 × 21/10 × 21 = 840/210 - Add the two like fractions:
720/210 + 840/210 = 720 + 840/210 = 1560/210 - 1560/210 simplified gives 52/7
- So, 72/21 + 40/10 = 52/7
In mixed form: 73/7
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