Add 90/20 and 42/7
1st number: 4 10/20, 2nd number: 6 0/7
90/20 + 42/7 is 21/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
90/20 = 90 × 7/20 × 7 = 630/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
42/7 = 42 × 20/7 × 20 = 840/140 - Add the two like fractions:
630/140 + 840/140 = 630 + 840/140 = 1470/140 - 1470/140 simplified gives 21/2
- So, 90/20 + 42/7 = 21/2
In mixed form: 101/2
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