Add 42/72 and 80/30
1st number: 42/72, 2nd number: 2 20/30
42/72 + 80/30 is 13/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 30 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Likewise, for the 2nd fraction, since 30 × 12 = 360,
80/30 = 80 × 12/30 × 12 = 960/360 - Add the two like fractions:
210/360 + 960/360 = 210 + 960/360 = 1170/360 - 1170/360 simplified gives 13/4
- So, 42/72 + 80/30 = 13/4
In mixed form: 31/4
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