Add 72/90 and 54/70
72/90 + 54/70 is 11/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
72/90 = 72 × 7/90 × 7 = 504/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
54/70 = 54 × 9/70 × 9 = 486/630 - Add the two like fractions:
504/630 + 486/630 = 504 + 486/630 = 990/630 - 990/630 simplified gives 11/7
- So, 72/90 + 54/70 = 11/7
In mixed form: 14/7
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