Add 28/21 and 16/90
1st number: 1 7/21, 2nd number: 16/90
28/21 + 16/90 is 68/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
28/21 = 28 × 30/21 × 30 = 840/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
16/90 = 16 × 7/90 × 7 = 112/630 - Add the two like fractions:
840/630 + 112/630 = 840 + 112/630 = 952/630 - 952/630 simplified gives 68/45
- So, 28/21 + 16/90 = 68/45
In mixed form: 123/45
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