Add 90/72 and 30/20
1st number: 1 18/72, 2nd number: 1 10/20
90/72 + 30/20 is 11/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
30/20 = 30 × 18/20 × 18 = 540/360 - Add the two like fractions:
450/360 + 540/360 = 450 + 540/360 = 990/360 - 990/360 simplified gives 11/4
- So, 90/72 + 30/20 = 11/4
In mixed form: 23/4
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