2 1/7 + 20%+5 3/70=7 1/10+n,,nilai n adalah..tolong yaa

KPK dari 7, 100, 70 =700
2 100/700 + 140/700 +
5 30/700 = 7 270/700 =
7 27/70.
7 27/70 = 7 1/10 + n
n = 7 27/70 – 7 1/10
= 7 27/70 – 7 7/70
= 20/70
= 2/7.
Terima kasih