Add 4/21 and 72/70
1st number: 4/21, 2nd number: 1 2/70
4/21 + 72/70 is 128/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
4/21 = 4 × 10/21 × 10 = 40/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
72/70 = 72 × 3/70 × 3 = 216/210 - Add the two like fractions:
40/210 + 216/210 = 40 + 216/210 = 256/210 - 256/210 simplified gives 128/105
- So, 4/21 + 72/70 = 128/105
In mixed form: 123/105
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