Add 21/60 and 30/35
21/60 + 30/35 is 169/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
30/35 = 30 × 12/35 × 12 = 360/420 - Add the two like fractions:
147/420 + 360/420 = 147 + 360/420 = 507/420 - 507/420 simplified gives 169/140
- So, 21/60 + 30/35 = 169/140
In mixed form: 129/140
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