Add 18/70 and 90/72
1st number: 18/70, 2nd number: 1 18/72
18/70 + 90/72 is 211/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 70 × 36 = 2520,
18/70 = 18 × 36/70 × 36 = 648/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
90/72 = 90 × 35/72 × 35 = 3150/2520 - Add the two like fractions:
648/2520 + 3150/2520 = 648 + 3150/2520 = 3798/2520 - 3798/2520 simplified gives 211/140
- So, 18/70 + 90/72 = 211/140
In mixed form: 171/140
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