Add 45/60 and 30/21
1st number: 45/60, 2nd number: 1 9/21
45/60 + 30/21 is 61/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
45/60 = 45 × 7/60 × 7 = 315/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
30/21 = 30 × 20/21 × 20 = 600/420 - Add the two like fractions:
315/420 + 600/420 = 315 + 600/420 = 915/420 - 915/420 simplified gives 61/28
- So, 45/60 + 30/21 = 61/28
In mixed form: 25/28
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