Add 42/70 and 8/30
42/70 + 8/30 is 13/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
42/70 = 42 × 3/70 × 3 = 126/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
8/30 = 8 × 7/30 × 7 = 56/210 - Add the two like fractions:
126/210 + 56/210 = 126 + 56/210 = 182/210 - 182/210 simplified gives 13/15
- So, 42/70 + 8/30 = 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70+8/30 42/70+16/30 42/70+8/60 42/70+24/30 42/70+8/90 42/70+40/30 42/70+56/30