Add 70/40 and 81/84
1st number: 1 30/40, 2nd number: 81/84
70/40 + 81/84 is 19/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
70/40 = 70 × 21/40 × 21 = 1470/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
81/84 = 81 × 10/84 × 10 = 810/840 - Add the two like fractions:
1470/840 + 810/840 = 1470 + 810/840 = 2280/840 - 2280/840 simplified gives 19/7
- So, 70/40 + 81/84 = 19/7
In mixed form: 25/7
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