Add 20/72 and 2/90
20/72 + 2/90 is 3/10.
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,
20/72 = 20 × 5/72 × 5 = 100/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
2/90 = 2 × 4/90 × 4 = 8/360 - Add the two like fractions:
100/360 + 8/360 = 100 + 8/360 = 108/360 - 108/360 simplified gives 3/10
- So, 20/72 + 2/90 = 3/10
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