Add 90/70 and 7/4
1st number: 1 20/70, 2nd number: 1 3/4
90/70 + 7/4 is 85/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 4 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 4 × 35 = 140,
7/4 = 7 × 35/4 × 35 = 245/140 - Add the two like fractions:
180/140 + 245/140 = 180 + 245/140 = 425/140 - 425/140 simplified gives 85/28
- So, 90/70 + 7/4 = 85/28
In mixed form: 31/28
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