Add 18/72 and 9/90
18/72 + 9/90 is 7/20.
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,
18/72 = 18 × 5/72 × 5 = 90/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
9/90 = 9 × 4/90 × 4 = 36/360 - Add the two like fractions:
90/360 + 36/360 = 90 + 36/360 = 126/360 - 126/360 simplified gives 7/20
- So, 18/72 + 9/90 = 7/20
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