Solutions by everydaycalculation.com

9/28 + 18/70 is 81/140.

1. Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
2. For the 1st fraction, since 28 × 5 = 140,
9/28 = 9 × 5/28 × 5 = 45/140
3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
18/70 = 18 × 2/70 × 2 = 36/140 Download our mobile app and learn to work with fractions in your own time:
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