Add 28/20 and 21/7
1st number: 1 8/20, 2nd number: 3 0/7
28/20 + 21/7 is 22/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
28/20 = 28 × 7/20 × 7 = 196/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
21/7 = 21 × 20/7 × 20 = 420/140 - Add the two like fractions:
196/140 + 420/140 = 196 + 420/140 = 616/140 - 616/140 simplified gives 22/5
- So, 28/20 + 21/7 = 22/5
In mixed form: 42/5
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