Add 21/15 and 45/40
1st number: 1 6/15, 2nd number: 1 5/40
21/15 + 45/40 is 101/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
21/15 = 21 × 8/15 × 8 = 168/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
45/40 = 45 × 3/40 × 3 = 135/120 - Add the two like fractions:
168/120 + 135/120 = 168 + 135/120 = 303/120 - 303/120 simplified gives 101/40
- So, 21/15 + 45/40 = 101/40
In mixed form: 221/40
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