Add 90/8 and 21/40
1st number: 11 2/8, 2nd number: 21/40
90/8 + 21/40 is 471/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
90/8 = 90 × 5/8 × 5 = 450/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Add the two like fractions:
450/40 + 21/40 = 450 + 21/40 = 471/40 - So, 90/8 + 21/40 = 471/40
In mixed form: 1131/40
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