Add 81/18 and 70/40
1st number: 4 9/18, 2nd number: 1 30/40
81/18 + 70/40 is 25/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
81/18 = 81 × 20/18 × 20 = 1620/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
70/40 = 70 × 9/40 × 9 = 630/360 - Add the two like fractions:
1620/360 + 630/360 = 1620 + 630/360 = 2250/360 - 2250/360 simplified gives 25/4
- So, 81/18 + 70/40 = 25/4
In mixed form: 61/4
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