Add 72/90 and 45/70
72/90 + 45/70 is 101/70.
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,
45/70 = 45 × 9/70 × 9 = 405/630 - Add the two like fractions:
504/630 + 405/630 = 504 + 405/630 = 909/630 - 909/630 simplified gives 101/70
- So, 72/90 + 45/70 = 101/70
In mixed form: 131/70
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