Add 90/25 and 21/84
1st number: 3 15/25, 2nd number: 21/84
90/25 + 21/84 is 77/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 84 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 25 × 84 = 2100,
90/25 = 90 × 84/25 × 84 = 7560/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
21/84 = 21 × 25/84 × 25 = 525/2100 - Add the two like fractions:
7560/2100 + 525/2100 = 7560 + 525/2100 = 8085/2100 - 8085/2100 simplified gives 77/20
- So, 90/25 + 21/84 = 77/20
In mixed form: 317/20
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