Add 7/8 and 20/90
7/8 + 20/90 is 79/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
7/8 = 7 × 45/8 × 45 = 315/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
20/90 = 20 × 4/90 × 4 = 80/360 - Add the two like fractions:
315/360 + 80/360 = 315 + 80/360 = 395/360 - 395/360 simplified gives 79/72
- So, 7/8 + 20/90 = 79/72
In mixed form: 17/72
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