Add 15/70 and 9/90
15/70 + 9/90 is 11/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
9/90 = 9 × 7/90 × 7 = 63/630 - Add the two like fractions:
135/630 + 63/630 = 135 + 63/630 = 198/630 - 198/630 simplified gives 11/35
- So, 15/70 + 9/90 = 11/35
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