Add 70/42 and 90/72
1st number: 1 28/42, 2nd number: 1 18/72
70/42 + 90/72 is 35/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
70/42 = 70 × 12/42 × 12 = 840/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
90/72 = 90 × 7/72 × 7 = 630/504 - Add the two like fractions:
840/504 + 630/504 = 840 + 630/504 = 1470/504 - 1470/504 simplified gives 35/12
- So, 70/42 + 90/72 = 35/12
In mixed form: 211/12
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