Add 40/90 and 45/70
40/90 + 45/70 is 137/126.
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,
40/90 = 40 × 7/90 × 7 = 280/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
45/70 = 45 × 9/70 × 9 = 405/630 - Add the two like fractions:
280/630 + 405/630 = 280 + 405/630 = 685/630 - 685/630 simplified gives 137/126
- So, 40/90 + 45/70 = 137/126
In mixed form: 111/126
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