Add 48/42 and 4/40, Solve 1 6/42 + 4/40 as a fraction

Add 48/42 and 4/40

1^st number: 1 6/42, 2^nd number: 4/40

48/42 + 4/40 is 87/70.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 42 × 20 = 840,
48/42 = 48 × 20/42 × 20 = 960/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
4/40 = 4 × 21/40 × 21 = 84/840
Add the two like fractions:
960/840 + 84/840 = 960 + 84/840 = 1044/840
1044/840 simplified gives 87/70
So, 48/42 + 4/40 = 87/70
In mixed form: 117/70

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad