Add 30/21 and 4/40
1st number: 1 9/21, 2nd number: 4/40
30/21 + 4/40 is 107/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
30/21 = 30 × 40/21 × 40 = 1200/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
4/40 = 4 × 21/40 × 21 = 84/840 - Add the two like fractions:
1200/840 + 84/840 = 1200 + 84/840 = 1284/840 - 1284/840 simplified gives 107/70
- So, 30/21 + 4/40 = 107/70
In mixed form: 137/70
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