Add 48/40 and 28/21
1st number: 1 8/40, 2nd number: 1 7/21
48/40 + 28/21 is 38/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
48/40 = 48 × 21/40 × 21 = 1008/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
28/21 = 28 × 40/21 × 40 = 1120/840 - Add the two like fractions:
1008/840 + 1120/840 = 1008 + 1120/840 = 2128/840 - 2128/840 simplified gives 38/15
- So, 48/40 + 28/21 = 38/15
In mixed form: 28/15
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