Add 3/28 and 81/90
3/28 + 81/90 is 141/140.
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,
3/28 = 3 × 45/28 × 45 = 135/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
81/90 = 81 × 14/90 × 14 = 1134/1260 - Add the two like fractions:
135/1260 + 1134/1260 = 135 + 1134/1260 = 1269/1260 - 1269/1260 simplified gives 141/140
- So, 3/28 + 81/90 = 141/140
In mixed form: 11/140
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