Add 90/45 and 5/21
1st number: 2 0/45, 2nd number: 5/21
90/45 + 5/21 is 47/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
90/45 = 90 × 7/45 × 7 = 630/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
5/21 = 5 × 15/21 × 15 = 75/315 - Add the two like fractions:
630/315 + 75/315 = 630 + 75/315 = 705/315 - 705/315 simplified gives 47/21
- So, 90/45 + 5/21 = 47/21
In mixed form: 25/21
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