Add 20/90 and 63/72
20/90 + 63/72 is 79/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
20/90 = 20 × 4/90 × 4 = 80/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
63/72 = 63 × 5/72 × 5 = 315/360 - Add the two like fractions:
80/360 + 315/360 = 80 + 315/360 = 395/360 - 395/360 simplified gives 79/72
- So, 20/90 + 63/72 = 79/72
In mixed form: 17/72
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