Add 21/18 and 40/70
1st number: 1 3/18, 2nd number: 40/70
21/18 + 40/70 is 73/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
21/18 = 21 × 35/18 × 35 = 735/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
40/70 = 40 × 9/70 × 9 = 360/630 - Add the two like fractions:
735/630 + 360/630 = 735 + 360/630 = 1095/630 - 1095/630 simplified gives 73/42
- So, 21/18 + 40/70 = 73/42
In mixed form: 131/42
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