Add 42/72 and 80/90
42/72 + 80/90 is 53/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 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 90 × 4 = 360,
80/90 = 80 × 4/90 × 4 = 320/360 - Add the two like fractions:
210/360 + 320/360 = 210 + 320/360 = 530/360 - 530/360 simplified gives 53/36
- So, 42/72 + 80/90 = 53/36
In mixed form: 117/36
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