Add 4/28 and 81/90
4/28 + 81/90 is 73/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
4/28 = 4 × 45/28 × 45 = 180/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
81/90 = 81 × 14/90 × 14 = 1134/1260 - Add the two like fractions:
180/1260 + 1134/1260 = 180 + 1134/1260 = 1314/1260 - 1314/1260 simplified gives 73/70
- So, 4/28 + 81/90 = 73/70
In mixed form: 13/70
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