Add 9/84 and 42/40
1st number: 9/84, 2nd number: 1 2/40
9/84 + 42/40 is 81/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
9/84 = 9 × 10/84 × 10 = 90/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
42/40 = 42 × 21/40 × 21 = 882/840 - Add the two like fractions:
90/840 + 882/840 = 90 + 882/840 = 972/840 - 972/840 simplified gives 81/70
- So, 9/84 + 42/40 = 81/70
In mixed form: 111/70
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