Add 90/72 and 42/9
1st number: 1 18/72, 2nd number: 4 6/9
90/72 + 42/9 is 71/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
42/9 = 42 × 8/9 × 8 = 336/72 - Add the two like fractions:
90/72 + 336/72 = 90 + 336/72 = 426/72 - 426/72 simplified gives 71/12
- So, 90/72 + 42/9 = 71/12
In mixed form: 511/12
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