Add 21/90 and 90/56
1st number: 21/90, 2nd number: 1 34/56
21/90 + 90/56 is 773/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
21/90 = 21 × 28/90 × 28 = 588/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
90/56 = 90 × 45/56 × 45 = 4050/2520 - Add the two like fractions:
588/2520 + 4050/2520 = 588 + 4050/2520 = 4638/2520 - 4638/2520 simplified gives 773/420
- So, 21/90 + 90/56 = 773/420
In mixed form: 1353/420
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