Add 40/70 and 20/28
40/70 + 20/28 is 9/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
40/70 = 40 × 2/70 × 2 = 80/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
20/28 = 20 × 5/28 × 5 = 100/140 - Add the two like fractions:
80/140 + 100/140 = 80 + 100/140 = 180/140 - 180/140 simplified gives 9/7
- So, 40/70 + 20/28 = 9/7
In mixed form: 12/7
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