Add 90/70 and 40/28
1st number: 1 20/70, 2nd number: 1 12/28
90/70 + 40/28 is 19/7.
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,
90/70 = 90 × 2/70 × 2 = 180/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
40/28 = 40 × 5/28 × 5 = 200/140 - Add the two like fractions:
180/140 + 200/140 = 180 + 200/140 = 380/140 - 380/140 simplified gives 19/7
- So, 90/70 + 40/28 = 19/7
In mixed form: 25/7
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