Add 15/16 and 72/90
15/16 + 72/90 is 139/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 16 × 45 = 720,
15/16 = 15 × 45/16 × 45 = 675/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
72/90 = 72 × 8/90 × 8 = 576/720 - Add the two like fractions:
675/720 + 576/720 = 675 + 576/720 = 1251/720 - 1251/720 simplified gives 139/80
- So, 15/16 + 72/90 = 139/80
In mixed form: 159/80
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